I recently built my first gaming PC after months of preparation, featuring a 7800X3D, RTX 4070 Super, a B650 motherboard, and a 750W power supply. The setup went well; I powered it on, and everything lit up nicely. I quickly jumped into the BIOS, but then I noticed that the GPU fans were acting strangely. It turned out I had only connected one of the 8-pin PCIe connectors. I shut it down, connected the second cable, booted it up again, and everything seemed fine. I installed Windows, updated drivers, and played a few games without issues—temps were normal, and performance matched reviews. Now I'm worried, though, because I hear some coil whine when navigating menus, and I experienced a brief black screen while switching out of a game. There haven't been any crashes or visual problems, and benchmarks pass. Could running the 4070 Super briefly with just one 8-pin connector cause damage, or is it likely I'm just overthinking it? Should I consider RMA now or try to relax?
4 Answers
You're probably just being a bit paranoid! The coil whine and short black screen you experienced aren’t indicators of potential damage to your GPU. Coil whine often happens under specific conditions like high FPS in menus. Try capping the frame rates to avoid it in the future.
Nah, you’re good! The fact it powered on with one connection means it’s functioning. A dual cable setup is ideal, but having one won’t ruin it. Just enjoy your PC for now!
Exactly! It sounds like you're well-equipped for gaming.
You really haven’t damaged your GPU. Coil whine is just a byproduct of the technology and not a sign of failure. If it’s running well in games and benchmarks, you should be good to go. Just enjoy it and don’t sweat the small stuff!
From what you're describing, I think your GPU is perfectly fine. It sounds like all the functions are working, and coil whine isn’t usually a sign of impending failure. If you want peace of mind, you could always run a stress test, but I really wouldn’t worry about it!
That’s true. My old card had similar issues but went away after undervolting.