RTX 5090 Founders Edition + CoolerMaster MWE Gold V2 1250W – 12VHPWR Cable Compatibility Issue

[Galveo]

Hey all,

 

I’ve recently picked up an RTX 5090 Founders Edition and I’m running it with a CoolerMaster MWE Gold V2 1250W PSU. Unfortunately, I’m running into an issue with the included 12VHPWR cable from CoolerMaster.

 

The cable is right-angled, but due to the design of the 5090 FE, it doesn’t physically fit. I contacted CoolerMaster support, and they advised that the right-angled connector has a removable plastic shroud which, when taken off, turns it into a straight connector. However, after removing the shroud, there’s still a plastic portion that sticks out just enough to interfere with seating it properly in the GPU. I can’t see a safe way to remove this extra bit without risking damage.

 

To make things worse, the 5090 adapter cable that NVIDIA provides requires 4x PCIe 8-pin cables, but the PSU only comes with 3—so I can’t even fall back on the adapter route unless I buy another cable separately.

 

I’m trying to avoid replacing the PSU if possible. Has anyone run into this and found a clean workaround? Are there any aftermarket 12VHPWR cables that are fully compatible with this PSU and the 5090 FE? Or can anyone confirm if CoolerMaster sells a proper straight 12VHPWR cable for this model?

 

Appreciate any advice.

[OddOod]

20 minutes ago, Galveo said:

I can’t see a safe way to remove this extra bit without risking damage.

Got a pair of wire cutters? You should be able to snip it off. It's just plastic. 
I can think of a half dozen ways to trim it, but wirecutters would be the best and safest

PS, LOVE that end grain butcher block. 

[GuiltySpark_]

I would have not bought a 90-degree cable with an FE but we're past that now. 

 

They do sell one with only 3x 8-pin but it still that same 90-degree style. https://www.coolermaster.com/en-us/products/12vhpwr-adapter-cable/

 

I've been very happy with my ModDIY custom cable on my 4090, can order it any way you please. 

 

That all being said yeah, I'd just snip off the extra plastic.

[Galveo]

Looks like it’s time to snip!
 

Will provide a progress update in the next couple of hours. (The joy of having a newborn, everything takes about 10x longer.)

 

 

 

 

[Galveo]

Well it’s done, we are up and running! Going to run a furmark benchy for an hour just to make sure everything is peachy. 
 

Thanks so much for your help.

 

When in doubt, snip your way out!

 

 

[OddOod]

16 hours ago, Galveo said:

When in doubt, snip your way out!

If you did that earlier you'd have avoided the newborn problem
jk
Congrats on the kid and the card!

[Galveo]

On 6/24/2025 at 2:42 PM, OddOod said:

If you did that earlier you'd have avoided the newborn problem
jk
Congrats on the kid and the card!

Hahaha, very good!