[SOLVED] PCI-E cable pin keyed wrong.

[fishonron]

I'm replacing the PSU on a desktop I built years ago.

The old PSU had a hardwired 8 pin cable to power the GPU. The cable from the new PSU is a 6+2 which should plug in just fine into the 8 pin socket.

The problem is one of the pins is keyed wrong. What I have circled in the picture is a rounded socket. The new PCI-E cable has a square pin at that location. The 7 other pins are keyed correctly.

The GPU is a Gigabyte GA-Z97X-Gaming 3
The old PSU is a Corsair CX750M
The new is an Antec EAG 750W



Is the socket for the GPU not a PCI-E? Is there an adapter available? If there is I'm not finding it.

 

[rgd1101]

it modular psu. are you sure you using the right one?

 

[Archaic59]

I'm replacing the PSU on a desktop I built years ago.

The old PSU had a hardwired 8 pin cable to power the GPU. The cable from the new PSU is a 6+2 which should plug in just fine into the 8 pin socket.

The problem is one of the pins is keyed wrong. What I have circled in the picture is a rounded socket. The new PCI-E cable has a square pin at that location. The 7 other pins are keyed correctly.

The GPU is a Gigabyte GA-Z97X-Gaming 3
The old PSU is a Corsair CX750M
The new is an Antec EAG 750W



Is the socket for the GPU not a PCI-E? Is there an adapter available? If there is I'm not finding it.

The GPU is a Gigabyte GA-Z97X-Gaming 3

That's a motherboard part number, not GPU (video card). Is the pic from your motherboard or video card? PCIe cables (6+2)pin connect directly to the video card. The 8-pin (4+4) connect to the motherboard at the top left of the board to power the CPU. Do not use the old power supply wiring.

 

[USAFRet]

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The old PSU is a Corsair CX750M
The new is an Antec EAG 750W
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You CANNOT mix/match cables between them. You WILL kill some parts.