I'm about to upgrade from a 3070 to a 5080, and I've got a Corsair RM1000e power supply, which comes equipped with 2 single 8-pin PCIe cables and 2 split 8-pin cables. The 5080 requires three 8-pin cables, so my plan is to use two of the single cables and one connector from one of the split cables, leaving the other connector unused. Is this a good idea, or could there be any issues with this setup? It seems better than just using one 8-pin cable with both connectors from the split cable, right?
3 Answers
You might want to check if your PSU has a native 12vhpwr cable. It could be more efficient to utilize that than a split adapter.
So, here's the deal: the original 8-pin connectors from the GPU are rated for 150W, but the ones from your PSU can supply 300W each. The 5080 uses around 360W, so the adapter is designed for more headroom with three connectors. If you've got two single cables and one from the split, you should be set without any risks.
Got it! So if I do decide to use the adapter that came with the 5080, I can mix one single 8-pin cable with one from the split cable?
Using the RM1000e is great since it can provide 300W from each 8-pin PSU connector. So you're more than fine using the native 2x8-pin to 12vhpwr cable, which can handle the 5080's power requirements easily.
That's good to know! I thought I needed to stick with all three 8-pin connectors since the card comes with an adapter that splits into them.
Yeah, but it does come with a 12vhpwr to a split 8-pin cable. I just heard that the 5080 typically requires three 8-pin connectors with its adapter, so I thought I'd best use them.