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Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

If you’re an enthusiast PC builder or upgrader, you may find yourself in need of extra CPU power cables for your Corsair power supply unit (PSU). Running dual CPUs or even just a power-hungry CPU like an Intel Core i9 or AMD Ryzen 9 can require more power cables than what your PSU shipped with. But have no fear – getting those extra CPU power cables is totally doable with a bit of DIY spirit!

Why You May Need Dual CPU Power Cables

There are a few key reasons you might need a second (or third, or fourth) CPU power cable for your Corsair PSU:

  • Running a dual CPU motherboard for serious multitasking power. Think AMD Threadripper or Intel Xeon workstation builds.
  • Supplying extra power to a very high TDP CPU like the Intel i9-10980XE (165W TDP).
  • Improving cable management by minimizing cable runs.
  • Overclocking – supplying stable power to a heavily overclocked CPU.

In most single CPU builds, one 4+4 pin EPS12V cable will do the trick. But hungry high end CPUs often benefit from having two separate cables rather than a single daisy-chained one. This avoids overtaxing a single cable or PSU rail.

Check Power Supply Wattage and CPU Power Connectors

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Before buying new CPU power cables, double check that your PSU can actually handle the extra power load. High wattage (750W+) Corsair units like the HX and AX series will have the necessary amps on the +12V rail(s). Make sure your PSU has enough unused EPS12V power connectors too – some only come with say 2x EPS ports max. Know your PSU!

Identify CPU Power Cable Type and Pins

Modern CPUs primarily use the 8 pin EPS12V connector, though some power hungry CPUs use two 8 pins for up to 16 total pins. Make sure to get the right cable for your CPU’s power socket. Also pay attention to whether your PSU uses a 6+2 pin vs 4+4 pin cables so you get the correct replacement.

Getting the pinout right is crucial – mismatched pins can literally fry computer components! Refer to your PSU and motherboard manuals.

Buying Replacement Corsair CPU Cables

If you want an easy OEM solution, Corsair sells a wide variety of replacement PSU cables through their website or on Amazon. You’ll need to know your specific Corsair PSU model. Expect to pay $20-30 for a premium braided cable kit. Don’t use cables intended for a different Corsair PSU – pinouts differ!

DIY Custom CPU Power Cable Options

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Doing it yourself often costs less than buying from Corsair. You can sometimes find compatible cables on eBay for popular models. Or you can literally make your own cables with supplies from online PC mod shops. It takes more effort but isn’t too hard with some basic wiring know-how.

Just be 110% sure of the pinout for your PSU before connecting a DIY cable. Consult the PSU manual or manufacturer to be safe.

Extending Stock CPU Cables for Better Cable Management

If you’re just looking for more length to tidy up your build, extension cables are handy. Get good quality braided extensions in matching colors for a pro build look. Verify the extension uses the same pinout as your PSU.

Using Molex Adapters as Temporary CPU Power Fix

In a pinch, you can use a molex to 8 pin EPS adapter. This lets you plug in extra CPU power from spare molex/peripheral ports. It works but isn’t ideal – better for testing than permanent use. Plus it can clutter up your build.

Dual CPU Power Supply Considerations

Make sure your PSU can deliver enough juice for dual CPUs plus all your other components. Aim for at least an 80 Plus Gold PSU with 750W+ capacity. And make sure it has enough EPS12V ports – some PSUs may only come with 2x EPS connectors, so double check before buying.

Installing New CPU Power Cables Correctly

Plug cables in firmly with the clip side aligned correctly – don’t force anything. Pay attention to any labeling on the connectors. Make sure cables avoid pinch points and don’t press against hot components. And of course, refer back to your motherboard manual if in doubt.

Verifying Stable Power Delivery to Both CPUs

Once all hooked up, check for POST issues or errors. Load up a hardware monitor like HWInfo64 to check for any abnormal +12V readings during load testing. Stress test both CPUs simultaneously to make sure the extra cables can handle peak power draw. If everything checks out, you’re good to go!

With the right cables and some DIY spirit, you can outfit even the most power hungry dual CPU or overclocking rigs. Just be sure to do your homework to get cables that play nice with your specific Corsair PSU model. And take the proper precautions – PSU cables are not something to blindly guess on if you value your expensive PC components! But the payoff of a clean dual CPU setup running stably is well worth the effort.

Upgrading your PC often means upgrading your power needs. More CPUs, GPUs, drives – they all demand more juice from your power supply. If you’re a Corsair PSU owner, you may come to realize the stock cables can’t cut it for your upgraded rig. No worries – getting extra CPU power cables is totally doable if you know where to look and what to watch out for.

Check Power Supply Wattage and CPU Power Connectors

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Before running out to buy new cables, it pays to assess if your PSU can even handle the extra load. High wattage Corsair units like the HX1000 can supply some serious power, but lower tier models may falter with more connections.

I learned this the hard way – my old CX500M choked when I added a second GPU and more fans. Lesson learned – check your +12V rails can supply 40-50A for high end builds!

And know your PSU’s connector situation. Some Corsair units may only have say 2 EPS ports max, so adding a third cable is out of the question unless you mod it.

Read reviews and dig into the specs before assuming your PSU has unlimited power. An ounce of planning prevents a pound of fried PC parts!

Get to Know Power Supply Standards

In your PSU research, get familiar with:

  • Wattage ratings – aim for 750W+ for power hungry systems
  • 80 Plus efficiency ratings – shoot for Gold or better
  • Number of EPS12V ports – 2 may be the limit
  • Max amps per +12V rail – 30A+ preferably

And definitely look up the manual for your specific Corsair model – the pinouts and cabling can vary!

Consider Dual vs Single Rail Designs

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Some Corsair PSUs use a single beefy +12V rail, others split it into two or more smaller rails. Single rail is simpler but has downsides:

  • Higher risk of overloading the rail
  • Requires thick gauge wiring

Whereas a dual/multi-rail design compartamentalizes power delivery for better distribution. Just know both CPUs may end up on different rails.

There’s intense debate on single vs multi-rail merits. I suggest sticking with what your PSU was designed for unless you really know your stuff.

Get Your Cable Connectors Right

Modern CPUs primarily use the 8 pin EPS12V connector. Some need two 8 pins, totalling 16 pins for seriously power hungry CPUs.

Watch out for PSUs that use a 6+2 pin connector vs a native 8 pin (4+4). The shapes may fit but the pinout and voltage delivery won’t be right.

Molex 4 pin may work in a pinch but should be avoided – it’s not designed for CPU power delivery.

Getting the right cable and connector for your make/model PSU and CPU is crucial – miswired power can destroy components in a hurry!

In summary, know your PSU’s capabilities and specifications before attempting any cabling changes or upgrades. A little planning and research up front can prevent power problems down the road!

Identify CPU Power Cable Type and Pins

Upgrading your computer’s CPU often requires extra power cables from your power supply unit (PSU). This is especially true if you’re installing a high-end CPU that needs more juice. Corsair PSUs are popular for gaming PCs and workstations, but their wide selection of models can make identifying the right CPU power cable confusing.

Let’s break down how to identify the CPU power cable type and pin layout for your Corsair PSU. This will ensure you get the correct replacement cable if you need to add an extra one.

Check Your Corsair PSU Model

First, you’ll need to find out which specific Corsair PSU model you have. The easiest way is to simply open up your computer’s case and look at the label on the side of the power supply. There should be a model number like AX1000, RM850x, HX1200i, etc.

Alternatively, you can use software like Speccy to scan your system and identify components like the PSU make and model. This can be handy if your PSU is tucked away and hard to visually inspect.

Knowing the exact PSU model is crucial because the CPU power cables are not universally compatible, even across Corsair’s own product lineup. The shape of the connector and pin layout varies between models.

Determine If You Need a 4-Pin or 8-Pin CPU Cable

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Once you know your specific PSU model, refer to its product specs or manual to determine if it uses a 4-pin or 8-pin CPU power cable (some models support both). Most modern high-wattage PSUs use an 8-pin cable, while lower-powered units often just need a 4-pin.

For example, the Corsair RM850x comes with two 4+4 pin cables, which can be used as either an 8-pin or 4-pin. Meanwhile, the AX1200i comes with two dedicated 8-pin cables that cannot be separated into 4-pin.

Make sure your PSU has the right connector shape to match the CPU power socket on your motherboard. Higher-end CPUs often need two 8-pin connectors from the PSU.

Verify the Pinout of the CPU Power Cable

The last step is to verify the pinout of your PSU’s CPU cable. While the connectors may fit physically, the pinout (location of the positive and ground wires) can differ.

For example, an 8-pin EPS12V CPU cable has a different pinout than a 6+2 pin PCIe cable, even though both connectors are shaped the same. Using the wrong pinout can severely damage your components.

Consult the pinout diagram in your Corsair PSU manual or its product page specifications. Alternatively, use a multimeter to manually trace each wire to identify positive and ground pins.

As a general guideline, here are the standard CPU power cable pinouts for Corsair PSUs:

  • 4-pin EPS12V: Green with black stripe (ground) on pins 1 & 3
  • 8-pin EPS12V: Orange with black stripe (+12V) on pins 1, 3, 5, 7

However, always verify against your specific PSU model to be 100% sure.

What to Do If You Need More CPU Power Cables

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

If your higher-wattage CPU needs two 8-pin connectors and your PSU only included one CPU cable, you have a couple options:

  1. Use a dual 8-pin to 8-pin Y splitter. This takes your single CPU cable and splits it into two connectors.
  2. Purchase a Corsair EPS12V CPU cable compatibility kit. These come with an extra 8-pin or 4-pin CPU cable for your specific PSU model.
  3. Use a 6+2 pin PCIe cable, if your PSU manual verifies they have the same pinout. Be very cautious with this method.

The advantage of buying a Corsair CPU cable kit is that you know the cable is designed for your exact PSU model. It will have the proper connector shape and pinout guaranteed. Y splitters also work well, but verify the pins match on both connectors first.

With the right CPU power cable connected securely, you’ll be ready to power that new multi-core beast of a processor. Just be sure to double check those pins first or you might end up frying something!

Buying Replacement Corsair CPU Cables

So your power-hungry CPU upgrade demands more juice than your Corsair PSU can provide with the default cables. No worries – getting compatible replacement CPU cables is a straightforward process if you know what to look for.

Corsair offers a wide selection of CPU power cables for their various PSU models. Buying the right one comes down to matching 3 key things:

1. PSU Model Compatibility

Not all Corsair PSUs use the same CPU power cables. The connectors vary physically between models, so you need to match the replacement to your specific PSU.

For example, the AX1200i requires a dedicated 8-pin EPS12V cable, while the RM850x uses a more standard 4+4 pin cable. Getting one designed for the AX line won’t fit the RM models.

Before ordering, double check that the replacement cable explicitly lists compatibility with your Corsair model. The product description or title should mention the PSU model(s) it works with.

2. Connector Shape and Size

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

As mentioned, Corsair PSU CPU cables come in different shapes – most commonly either 4-pin or 8-pin. Make sure to get the appropriate shape to match the CPU socket on your motherboard.

Higher-end motherboards often need two 8-pin EPS12V connectors. If your PSU only included one, you’ll need to get an extra 8-pin cable.

Also keep in mind that some Corsair PSUs use cables that can be separated into two 4-pin connectors. So a single “4+4 pin” cable can be used as either an 8-pin or 4-pin as needed.

3. Pinout

The trickiest part is verifying that the replacement cable has the correct pinout to work safely with your PSU. The plastic connector might fit, but the internal pinout needs to match.

Using a CPU cable with the wrong pinout can blow out your components by sending power to the wrong pins. Always consult the PSU manual or specs to double check.

As an example, for most Corsairs an 8-pin EPS12V cable should have ground on pins 1, 3, 5, 7. Get a multimeter and test each pin yourself for 100% certainty.

Where to Buy Corsair CPU Replacement Cables

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Now that you know what to look for, here are some good options for purchasing compatible Corsair CPU cables:

  • Corsair’s Official Cable Kits – Come with extra 4-pin or 8-pin EPS12V cables for specific PSU models.
  • Third Party Replacement Cables – Available on Amazon, eBay, etc. Just be very careful to match PSU, connector shape, and pinout!
  • PSU Manufacturer Customer Support – Directly ask Corsair support about ordering replacement CPU cables for your specific model.

When in doubt, your best bet is to go straight to Corsair and provide your PSU model. They can confirm the exact replacement part number you need for a guaranteed compatible CPU cable.

DIY Corsair CPU Cable Making

If you can’t find a ready-made compatible cable, some handy PSU owners have figured out how to DIY their own. This requires crimping your own connectors and wires to match the PSU’s specs.

The advantage is you can fully customize the cable’s length and look. The downside is it requires a lot more effort, skill, and the right crimping tools.

There are some good YouTube tutorials showing how to DIY EPS12V cables for Corsair units. Just be extremely careful to match the pinout if going this route.

Tips for Connecting Replacement Corsair CPU Cables

Once you’ve got your compatible Corsair CPU cable, here are some quick tips for safely installing it:

  • Unplug the PSU from power before connecting or disconnecting any cables.
  • Connect the replacement cable directly to the PSU if possible. Avoid using Y-splitters when you can.
  • Double check the connectors are fully latched and clicked in on both ends.
  • Use cable ties and wire looms to keep the new cable tidy and avoid loose wires.
  • Verify in BIOS that the CPU is properly detecting the expected wattage from the new cable.

While it takes a bit of research, finding the right replacement CPU power cable will give your high-end Corsair PSU the juice it needs to power that new CPU upgrade and avoid potentially damaging mishaps.

DIY Custom CPU Power Cable Options

When off-the-shelf replacement CPU cables don’t fit your needs, one option is to make your own custom PSU cables. This DIY approach takes more effort but allows full control over the cable design.

Crafting custom CPU power cables for a Corsair PSU involves carefully matching the pinout, gauging the wires properly, and terminating the connectors. Here’s an overview of materials and steps for the DIY inclined.

Custom CPU Cable Considerations

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

First, you’ll want to think through a few things before busting out the crimping tools:

  • CPU power needs – Will a single 8-pin EPS12V cable provide enough power, or do you need to make a dual 8-pin Y-splitter?
  • Cable length – Measure how long the cable needs to be for a tidy install in your PC case.
  • Cable colors – Pick wire colors that will coordinate well with your build’s theme.
  • Connectors – Source compatible connector housings that fit your Corsair PSU.
  • Pinout – Verify and double check the PSU’s required pinout to avoid damage.

Materials and Tools Needed

Here are the typical supplies needed for DIY custom CPU power cables:

  • PSU connector housings – Match the shape your Corsair PSU uses, e.g. 4-pin or 8-pin EPS12V connectors.
  • 18 AWG wires – Use high strand count pure copper wires, 15-16 AWG for high power configs.
  • Crimping tool and pins – Molex hand crimper and compatible crimp pins.
  • Heat shrink tubing – Used to insulate wire connections.
  • Multimeter – To verify pinout by testing wires.

Quality materials and a proper crimping tool are highly recommended for reliability. Cheaping out can lead to risky loose connections down the line.

How to Make Your Own Corsair CPU Cable

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Once you’ve got the parts, here are the steps to make your own custom CPU cable:

  1. Cut wires to needed length, Strip about 1/2″ of insulation from both ends.
  2. Crimp pins onto one end of each wire. Follow pinout for your specific PSU model.
  3. Insert crimped pins into the connector housing until fully seated.
  4. Strip the other wire ends and crimp on the second connector.
  5. Use a multimeter to verify correct pinout by testing connectivity.
  6. Slide heat shrink tubing over wire connections and heat to seal.

Take it slow and double check every connection. Making your own CPU cable is satisfying, but messing up the pinout can fry your expensive PC parts.

Customizing Your Corsair CPU Cable

The benefit of DIY cables is complete control over the aesthetics. Here are some ideas to make your CPU cable unique:

  • Use paracord sleeving over the wires for a clean look.
  • Add cable combs for a tidy, parallel wire routing.
  • Heat shrink individual wire segments for a segmented appearance.
  • Splice in capacitors or ferrites to enhance stability.

Sleeve color patterns like black-white-black can look really sharp with good wire management. Get creative with your customization.

Safety Tips for DIY Corsair Cables

It’s crucial to assemble your wires safely. Here are some top safety tips:

  • Double check pinouts – Test with a multimeter, don’t just rely on diagrams.
  • Watch wire gauges – Stick to 16-18 AWG for these power cables.
  • Quality crimping – No loose pins or spotty connections.
  • Neat routing – Avoid a tangled mess of wires interfering with cooling.
  • Insulate connections – Heat shrink any exposed metal crimped sections.

Making your own CPU power cable takes precision and planning, but the end result can enable killer PC builds that are both powerful and beautiful.

Extending Stock CPU Cables for Better Cable Management

Dealing with short, stiff CPU power cables can make cable management a nightmare. Luckily, extending the stock cables on your Corsair PSU is an easy upgrade that can clean up the build.

Extending the cables gives you more flexibility for running them behind the motherboard tray or reaching top-mounted PSUs. Here are some tips for safely lengthening those short Corsair EPS12V cables.

Finding CPU Cable Extension Cables

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

First, you’ll want compatible extension cables that are designed for your specific Corsair PSU model. Here are some places to find them:

  • Corsair’s cable kits – They offer extension kits for many PSUs models, usually 6″ – 24″ long.
  • Third party extensions – Sold for specific Corsair units, often in various lengths.
  • Custom cabling companies – They can make custom extensions if you provide the PSU details.

The key things to match are the PSU side connector (4-pin or 8-pin EPS12V) and the pinout. The extensions simply plug in between the PSU and motherboard cable.

How to Install CPU Cable Extensions

Installing the extensions is very straightforward:

  1. Unplug the PSU from power and from components.
  2. Connect the extension’s female end to the male EPS12V cable on the PSU.
  3. Connect the extension’s male end to the female EPS12V header on the motherboard.
  4. Use cable combs and ties to tidy and secure the extended cable.

Take care not to bend the connections too sharply and ensure the extensions are fully seated. Use good wire management practices to avoid a tangled mess of cables.

DIY CPU Cable Extensions

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

You can also DIY your own extensions for a custom fit. This just requires:

  • Matching EPS12V connectors.
  • 16-18 AWG wires in preferred length.
  • Tools for crimping pins and terminals.
  • Heat shrink tubing.

DIY extensions allow choosing the exact wire length and sleeve colors. But be extremely careful in matching the pinout to the PSU.

Tips for Extended Cables

Here are some tips when extending CPU power cables:

  • Don’t overload the wires – Avoid excessive length or power draw through skinny wires.
  • Use single extensions – Chaining multiple extensions can cause voltage drop.
  • Verify connections are snug – No loose or intermittent contacts.
  • Keep wire routing clean – Prevent too much cable bunching up.
  • Label connectors – Helps quickly identify the CPU cables.

With extended cables, take advantage of the extra length to run them behind the motherboard for a streamlined look. Use cable combs, sleeves, and wraps to keep them organized.

When to Use PSU Shrouds

For cases with PSU shrouds, extending the cables may not be necessary. A PSU shroud covers up the bottom PSU area for a clean look.

Since the PSU is hidden, the cables can directly run behind the shroud to the components above. This avoids seeing unsightly bundles of cables snaking around.

But for smaller cases without shrouds, extending those stubborn CPU cables can be a great way to improve cable management and airflow.

With some online searching and elbow grease, longer customizable CPU cables can give you back control over your build’s look. Power on proudly!

Using Molex Adapters as Temporary CPU Power Fix

If you’re in a bind without the right CPU power cable for your Corsair PSU, some builders use Molex to EPS12V adapters as a temporary workaround. However, this duct tape-like fix should only be used with extreme caution.

Molex adapters convert a spare PSU Molex connector to an 8-pin or 4-pin EPS12V CPU cable. This can get your PC booted until you source a proper CPU cable replacement.

Dangers of Molex CPU Power Adapters

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

There are a few reasons Molex adapters are not recommended as a permanent solution:

  • Fire hazard – Molex wires are thinner and not rated for high CPU power draw.
  • Poor voltage regulation – Voltage spikes/drops causing instability.
  • Loose connections – Potentially high resistance contacts.
  • Messy wiring – Danger of shorting against case.

Molex connectors are only designed to deliver around 50-60 watts, far below a modern CPU’s needs. Significant overcurrent through the adapter could lead to melted wires or fire.

When Molex Adapters May Work

However, Molex adapters might be temporarily usable in certain lower-powered setups:

  • Office or HTPC systems with lower wattage CPUs.
  • As a quick test for troubleshooting CPUs or motherboards.
  • Bridging the gap while waiting for a real EPS12V cable replacement.

For example, if you need to flash a BIOS update but have no CPU power cable, a Molex adapter could work as a temporary fix in a pinch. Still use caution.

Tips for Using Molex CPU Adapters Safely

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

If you must attempt using a Molex adapter, here are some tips to minimize risk:

  • Verify the pinout matches EPS12V standard (usually does).
  • Make sure contact pins are not loose or corroded.
  • Do not daisy chain multiple Molex adapters.
  • Check wires for any cuts, tears, or damage.
  • Keep load low, avoid taxing the CPU during use.

Also monitor temperatures closely and stop immediately if wires feel hot to the touch. Only use Molex adapters very temporarily until you can properly replace the PSU’s real CPU cables.

Other EPS12V Power Options

Here are some other alternatives if you lack the right CPU power cable:

  • Use PCIe to EPS12V adapter (challenges similar to Molex).
  • Connect an external PSU just for CPU power.
  • Replace the PSU with one that has required CPU cables.
  • Make your own custom CPU cable carefully matching the pinout.

While Molex to EPS12V adapters should only be a last resort, they can potentially work in very low-powered, temporary situations. But remember to be extremely cautious and watch for overheating.

For reliable power to your CPU, it’s best to properly source a compatible EPS12V cable made specifically for your Corsair PSU. Game on safely!

Dual CPU Power Supply Considerations

Adding a second CPU to your PC build can provide a nice boost in performance, but it also comes with increased power requirements. Many PC enthusiasts looking to upgrade to a dual CPU system find themselves needing additional CPU power cables for their Corsair PSU. While Corsair makes some excellent power supplies, most of their mainstream models only come with the cables for powering one CPU. So what can you do if your Corsair PSU doesn’t have enough cables for dual CPUs?

Upgrading the power supply is certainly an option, but not always necessary. There are a couple easy DIY solutions that allow you to use your existing Corsair PSU without having to replace it. Let’s look at some dual CPU power supply considerations and how to get the extra cables you need.

Using Modular Cables

One of the easiest ways to add a second CPU power cable is by using a modular cable kit. These allow you to customize the cables for your specific power supply. They plug right into the unit just like the stock cables. The only catch is that you need a modular Corsair PSU for them to work. If your power supply has fixed cables, you’ll need to find another solution.

There are a few brands that make modular PSU cable kits, but Corsair’s own premium individually sleeved cable kits are a great option. They come in a variety of colors and provide everything you need to power dual CPUs. Simply swap out the stock 24-pin ATX and 8-pin EPS cable for a dual 8-pin EPS version. It’s an easy way to upgrade without having to replace the actual power supply.

Making Your Own Cables

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

For those with non-modular Corsair PSUs, making your own custom cables is another DIY option. This requires a bit more effort, but can save money compared to buying a new power supply. All you need is a crimping tool, some pins/connectors, and 16AWG wire.

The process involves carefully removing one of the peripheral cables from your PSU, such as a SATA or Molex cable. These use thinner 18AWG wire. The 16AWG can handle the higher current of the CPU. Simply match the pinout, crimp on the appropriate connector, sleeve the wire, and you’ll have a second 8-pin EPS cable for your extra CPU.

It’s important use caution when making your own PSU cables. Incorrect pins or poor crimping can cause shorts. Always double check the wiring diagrams for your specific Corsair PSU before attempting this. But if done properly, it’s a cost-effective way add the extra cable you need.

Using Dual 8-pin Adapters

Perhaps the quickest and easiest solution is to simply use a dual 8-pin EPS adapter. These are available from various brands and let you plug two CPU power connectors into one port on the PSU. Just make sure the adapter is designed specifically for EPS connectors and can handle the increased electrical load.

This approach works on both modular and non-modular Corsair PSUs. You don’t have to modify anything on the actual power supply. Just plug the single 8-pin side into your unit, and the two 8-pin connectors into each CPU. It’s a simple and affordable way to provide sufficient power for dual CPUs.

Considering a New Power Supply

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

While the above solutions allow you to avoid buying a new PSU, there are some benefits to upgrading. A higher wattage unit gives you more headroom for overclocking and future upgrades. It also reduces the load compared to running dual CPUs on an existing lower wattage PSU.

Corsair’s HXi and HX series are great choices for high end systems with multiple CPUs. Models such as the HX1000i come with the necessary cables for powering dual processors right out of the box. The digital Link software also provides desktop monitoring of voltages, power draw, temperatures, and fan speeds.

So in summary, adding a second CPU doesn’t have to mean getting a new power supply. With some simple modifications or adapters, you can use your existing Corsair unit. But a higher wattage PSU does provide some advantages. Evaluate your needs and budget to decide if an upgrade makes sense for your particular build.

Installing New CPU Power Cables Correctly

Adding extra CPU power cables to your Corsair PSU can provide the juice needed for a dual CPU system. But it’s crucial to install these new cables properly to avoid potential issues. Improper installation can lead to shorts, fried components, and even fire hazards. Let’s look at some tips for safely installing new CPU power cables on a Corsair PSU.

Choose the Right Cables

Not all PSU cables are created equal. It’s important to select cables designed specifically for your Corsair power supply model. The pinout must match precisely. Using mismatched cables risks connecting the wrong pins together which can destroy parts.

For modular Corsair PSUs, stick with cables made by Corsair or reputable third party brands that are advertised as compatible. For non-modular models, use similar gauge wire and double check the pin diagrams before crimping on any connectors.

Take Safety Precautions

Anytime you open up a PSU, safety should be your top concern. Make sure to unplug the power cord before installing new cables. Capacitors inside can retain dangerous charges even when switched off. Give them time to fully discharge before working on the unit.

Avoid working on carpeted surfaces which can generate static electricity. Only use insulated tools and wear rubber gloves for extra protection. Installing PSU cables is an advanced procedure, so exercise extreme care when handling exposed wiring.

Insert Cables Securely

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

Whether using modular connectors or crimped pins, make sure new CPU cables are fully inserted into the PSU. Any loose connections can potentially arc, melt insulation, or break entirely when under load.

Modular cables should click audibly into place. Give each one a gentle tug to confirm it’s firmly seated in the PSU housing before closing up the unit. Use a magnifying glass to inspect crimped pins for a tight fit.

Route Cables Carefully

Once connected to the PSU, the way you route the new CPU cables matters. Keep them away from warm components and sharp edges that could potentially damage the insulation over time. It’s better to run cables behind the motherboard tray whenever possible.

Avoid excess cable pressure on the connections by using velcro ties to secure slack. But don’t cinch them down so tightly that circulation is constricted. Proper cable management reduces stress and prevents accidental dislodging.

Check Connector Orientation

CPU power cables are generally 8-pin EPS connectors. Make sure to align the clips properly when plugging them into the motherboard. They are often polarized and won’t seat correctly if reversed.

Most EPS connectors are keyed so they can only fit one way. If a cable doesn’t want to push all the way in, don’t force it. Double check you have the orientation right before applying excessive pressure.

Verify Everything is Working

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

After installing new CPU power cables, take a moment to verify everything is working properly before buttoning up your system.

Boot up and load into the BIOS. Use HWMonitor or Corsair Link software to check voltages and make sure both EPS connectors are delivering power. Monitor temperatures closely the first time you put the system under load to catch any potential problems.

As long as your cables are compatible, securely installed, and properly connected, your upgraded Corsair PSU should work flawlessly with dual CPUs. Taking the time to correctly install new power cables reduces the chance of expensive mistakes down the road.

Verifying Stable Power Delivery to Both CPUs

When running a dual CPU system powered by a Corsair PSU, it’s important to verify stable power delivery. Insufficient or unstable power can lead to crashes, throttling, and component damage. Let’s look at some tips for confirming your upgraded Corsair power supply can reliably handle the needs of two hungry CPUs.

Check the +12V Rails

The +12V rails provide power directly to the CPUs. Any fluctuations or drops here will quickly impact system stability. After connecting both EPS cables, use software to monitor the +12V supply voltages under load. HWInfo and HWMonitor are good free options.

Quality PSUs like Corsair’s AX and HX models should maintain 12V rails within 5% of the ideal 12V, or between 11.4V and 12.6V. Any drooping below 11.4V under load indicates the PSU is struggling.

Look for CPU Threshold Warnings

CPUs draw varying amounts of current depending on workload. Exceeding power delivery thresholds will trigger warnings or automatic throttling.

Watch for messages about CPU or VRM thermal events in monitoring software. These can indicate more power is being drawn than the voltage regulation can handle. Adjust LLC settings to stabilize voltage delivery.

Stress Test with Power-Hungry Apps

Stability when idling or lightly loaded doesn’t guarantee sufficient power delivery under heavy sustained workloads. Stress test CPUs together with power-intensive apps.

Prime95 and IntelBurnTest push CPUs to their limit. Loop Cinebench R23 runs to simultaneously load both CPUs at 100% for an extended period. Monitor temperatures, clock speeds, voltages, and wattage throughout testing.

Try Overclocking Both CPUs

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

If your system remains stable with both CPUs at stock settings, try overclocking them incrementally to put greater demand on the PSU. This is a good way to validate the PSU can still maintain clean stable power.

Increase CPU core clocks, memory frequency, and voltages little by little, testing stability along the way. Don’t go for maximum OC headroom – just push far enough to simulate a worst-case power draw scenario.

Verify All Other Components are Functional

Draw from other system components affects PSU load regulation for the CPUs. Make sure all GPUs, drives, fans, RGB lighting, etc. are connected and operational when stress testing.

This replicates a real-world total system load. Any peripherals drawing their max power in addition to fully loaded CPUs further validates the PSU’s capabilities.

Check Temperatures Under Load

Higher temperatures indicate components are working harder and drawing more power. Monitor CPU, VRM, chipset, and PSU temperatures during stress testing.

Make sure there is adequate system cooling to handle the heat of both CPUs at full load. Thermal throttling from insufficient cooling will reduce power draw and mask potential stability issues.

Use Multiple Stress Testing Apps Together

Need Extra CPU Power Cables for Corsair PSU: Make These Easy Upgrades

For complete confidence in system stability, run different stress testing apps simultaneously. This makes it virtually impossible for the PSU to throttle or power limit the CPUs.

Loop Cinebench multi-core testing in the background while also running Prime95 small FFTs torture test. The combined 100% load leaves no headroom for PSU limitations to hide.

If your Corsair PSU can keep both overclocked CPUs running full throttle for hours on end without crashing or throttling, you can rest assured power delivery is stable.