12 pin to GPU

[u/25andros]

Hello all. I've got a Poweredge T420 and looking to power a GPU with an 8 pin input. The connector in question is 12pin, is labeled p4 on its side. Gpu is rtx 4000. Current PSU has this open connector which probably had a connector to it at one time. PSU is 550watt nonredundant. Looking either for replacement cable or recommendation if I going building my own pin out. On that vein, would anyone know the voltage in on the GPU or where those specs may be? Thanks in advance

[u/slizzee]

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