A 4090 needs 450W of power so a Corsair SF750 is enough if you not use a 300W OC CPU.
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DAN C4-SFX
- Thread starter dondan
- Start date
4090 "only" needs 3x8pins. 4x8pins is only needed between 450w and 600W
Corsair thinks you only need 2 since their replacement cable for the RTX 4090 only has 2x8 pin PCIe.
Technically, the maximum safest power for an 8 pins cable is 288W (8+8 is also 288W, but combined).
If the GPU is installed at the top, and hot air exhausts from the sides, are the large feet necessary? Will we be able to change the feet to something more low profile, or remove the piece entirely?
Its not PCIe though. It is a Type 4 pinout that is used for both CPU/EPS12V and PCIe and it can deliver up to 300W each. Hence the 2x8pin Type 4 is already enough for 12VHPWR to deliver 600W. I dont know why people always forget that the exact same port is used for EPS12V which can deliver 300W. A single daisy chained PCIe cable that comes included in Corsair SF750 already delivers 300W anyway.
I'd rather spread the load between as many PSU-side connectors as possible and the SF750 only offers 4 Type 4 connectors (one of which is being used for EPS12V)
The included 4x8pin to 16pin will not work in the C4-SFX. You have to use the the Corsair cable to be able to close the side panel
And yes the male 8pin are EPS connectors so each can handle 300W.
And yes the male 8pin are EPS connectors so each can handle 300W.
Technically, the maximum safest power for an 8 pins cable is 288W (8+8 is also 288W, but combined).
THIS!
I get questions all the time about random GPU crashing only to find out someone hooked up their high power GPU to a single cable but with dual connectors. 288W from a single connector on the PSU.
If a single 12-pin connector can handle 600w, then a single 6/8-pin connector should be fine for 288w. More likely the cable is too thin to handle the current to avoid excessive voltage drop, thus GPU instability.
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This new CableMod 12VHPWR Right Angle Adapter looks like it could be a good solution too: https://store.cablemod.com/cablemod-12vhpwr-right-angle-adapter/The included 4x8pin to 16pin will not work in the C4-SFX. You have to use the the Corsair cable to be able to close the side panel
And yes the male 8pin are EPS connectors so each can handle 300W.
Slim Profile? 
Yes in comparison to the included Y-Adapter it is "slim".
The new Corsair SFX 12VHOWR accessoires cables is only 15mm in height with cables bended. This adapter will not fit on a RTX 4090 FE inside the C4-SFX.
Yes in comparison to the included Y-Adapter it is "slim".The new Corsair SFX 12VHOWR accessoires cables is only 15mm in height with cables bended. This adapter will not fit on a RTX 4090 FE inside the C4-SFX.
Ahhh that's too bad...Slim Profile?
The new Corsair SFX 12VHOWR accessoires cables is only 15mm in height with cables bended. This adapter will not fit on a RTX 4090 FE inside the C4-SFX.
Thanks for confirming @dondan.
i really didn't like the vertical 12-pin on the 3090/3080 but now i'm starting to miss it
Yes Corsair's cable is only compatible with Corsair PSUs.
Silverstone has their own 12VHPWR cable but I don't think it's available separately.
Custom cable makers should be able to make some for your PSU though.
