Hey everyone! I recently built my first PC and am using a 5090 GPU with a Corsair HX1000i PSU. The PSU came with two dual 8-pin power cables, each having one 8-pin connector for the PSU and two dual 8-pin connectors for the GPU's cable. The GPU's cable has a 16-pin connector on one end and four female 8-pin ends on the other that connect to those dual connectors from the PSU. I've seen some conflicting info online about power limits—some say it's capped at 300 watts per connection while others suggest 450 watts. However, I'm measuring up to 575 watts usage, potentially nearing 600 under load. Is this setup safe? I'm feeling a bit confused after researching, so I'd appreciate any insights! Thanks!
3 Answers
If you’ve got the PSU recently, it might have the newer 12V-2x6 600W cable, which would be better. Generally, it's best to avoid daisy chaining cables, but the HX1000i is known to handle it well. Still, if you're concerned, consider swapping it out for peace of mind.
Just a heads up, there's a difference between dual 8-pin and standard multi 8-pin connectors. The dual 8-pin ones can handle around 640W total, while the multi 8-pin connectors are limited to 150W each. Since you're using two dual 8-pins, you should be fine!
Got it! That makes a lot more sense now; I'm well under limits. Thanks!
I think you're good as long as you're not encountering glitches or blue screens. Just look at your PSU's specs; it shows setups like yours that support the required wattage well. So as long as everything's stable, you should be in the clear!
Awesome, thanks for the reassurance!
Unfortunately, Corsair is a bit limited with cables in this setup. The existing cable setup you mentioned is probably intended for less power-hungry GPUs.