I have an ASUS Dual RTX 4060 Ti 8GB that requires one 8-pin power connector installed in my second PC. However, the PSU in PC #2 is a Corsair RM1000e, and I don't have the correct 8-pin PCIe cable for it right now; I only have a 6-pin PCIe cable available. My first PC has a Lian Li EDGE 850 PSU with an extra PCIe 6+2 pin cable that I could use. I'm wondering if I can safely use that spare PCIe cable plugged into the Lian Li PSU in PC #1, running it over to power the GPU in PC #2, which is already installed in that system's motherboard. Just to clarify, I'm not asking about directly plugging the Lian Li cable into the Corsair PSU; I'm asking if it's okay to power the GPU from the different PSU in another PC.
3 Answers
If your intention is to power the GPU in PC #2 using a cable from a different PSU, only do it if both PSUs are the same model and have compatible pin configurations. Otherwise, you could end up causing some serious harm to your hardware.
Yes, you can technically do this, but it's a bit risky. You’d be mixing PSU cables from different systems, which isn't generally recommended because of possible incompatibilities. Powering a GPU from a different PSU is sort of going against conventional PC building practices, so just keep that in mind!
It's a bad idea to mix cables from different PSUs. While you might get lucky and avoid issues, there's a significant risk of frying your components if the cables aren't compatible. The pins may fit, but their wiring could be different!
I agree, you should avoid doing this. Always use the designated cables that come with your PSU or are specifically made for it. It's just not worth the risk of damaging your system.