I'm trying to figure out the power requirements for my new 5070 Ti graphics card. The power supply I have came with two 8-pin cables, but the GPU actually wants three. I've read in some older forums that using the two 8-pins along with an additional 6+2 cable that's daisy-chained to them should work well enough. However, I've also got some leftover 6+2 cables from an old Corsair power supply, but they don't look as heavy-duty as the new ones that came with my current PSU. What's my safest option here?
3 Answers
Mixing and matching PSU cables can really be a disaster waiting to happen. Always use the cables designed for your current PSU to avoid any fire hazards. Just ask for the model of your power supply; if it’s old, consider upgrading to a modern one that better supports your GPU without the need to daisy-chain.
If you already have five 8-pin slots in your PSU, you might as well return it and grab one that comes with enough 8-pin cables to support your GPU fully. Just having two CPU 8-pins and two PCIe 8-pins isn't going to cut it for your graphics card!
Yeah, it has 5 slots but only came with 2 CPU 8-pin and 2 PCIe 8-pin cables.
Never use old cables with a new PSU! It's just too risky. Your system could fail or even catch fire if you mix cables not designed for your specific PSU model. Stick with the brand new cables that came with your power supply for safety!
I read the same thing while researching, so I just tossed out the old cables I had!
It's a brand new Cooler Master MWE 850 V2 modular PSU.