I'm having some trouble with the power connections for my new GPU setup. My current graphics card is a 4070 TI, which I've been using with two 8-pin connectors via an adaptor cable. It has started failing, so I planned to upgrade to a 5070 TI. However, when I connected the 5070 TI (without powering on the PC), I noticed a solid red light. When I actually boot up, there's no display and the fans don't turn on at all. From what I found, the 5070 TI requires three 8-pin connectors using the correct cable. My Corsair PSU is currently using two daisy-chained 8-pin connectors. I tried connecting one of the additional daisy-chained connectors, which eliminated the red light, but the GPU still didn't turn on – no fans, no display. According to Corsair, my setup should be fine, but I want to make sure that using one of the daisy-chained connectors is indeed going to work before I dive deeper into this, especially since accessing the PSU is difficult due to a shroud in my custom build.
3 Answers
Sounds like the real issue might be with the PCI-E slot itself. I had similar experiences where a mishap with a screwdriver led to damaging the slot, resulting in no signal. It's good that you figured it out, but that’s a bummer about needing a new PC now!
I have a 5070 Ti too, and I connect mine using two cables and three connectors, including one pigtail. It works perfectly. Maybe your GPU displayed the red light because it needed those three connectors to power on.
How old is your Corsair RM850x? They usually come with a native 12v2x6 cable now, which would bypass the need for an adapter entirely. If yours is a bit older, it might not have that.
It's about 3 years old, so I don't think it has the native connector. Plus, getting to it is a hassle because of the shroud.
That’s what I was thinking too. It's strange that it showed a red light with only two connected but won’t start with three. I might not have plugged the pigtail in all the way. I’ll check again tomorrow.