Unusual actions from the computer after installing the new graphics card.
Unusual actions from the computer after installing the new graphics card.
I upgraded my GTX 1060 to an RX 6700XT. The system has run smoothly for nearly a year with the older graphics card. I followed the recommended steps: booted in safe mode, used DDU tools, powered down and back on, performed a GPU swap, then reinstalled drivers. Right after turning it back on, I experienced significant lag and performance drops, though I initially blamed the drivers. After multiple driver updates and a fresh Windows install, the issues continued. Game FPS remained lower than my previous card. I suspected the new GPU might be faulty, so I tried it on another machine, which performed flawlessly. My focus then shifted to the power supply unit—the new card uses both an 8-pin and a 6-pin PCIe connector, unlike the 1060 which only needed an 8-pin. Despite extensive troubleshooting and keeping everything unchanged, the problem persists. I still think the PSU or its connectors could be the culprit, but the symptoms are puzzling. Occasionally the PC goes green screen (green, not blue) without obvious cause. It sometimes recovers on its own, but other times a restart is necessary. The AIO fan often increases more than expected during light tasks, and the GPU fluctuates wildly between 1% and 100%, cycling up and down every few seconds. This pattern lasted for some time until it abruptly ceased, followed by slowed fans and both components returning to idle. At times the system runs perfectly, at others it becomes so sluggish it’s nearly unusable. In short, help is needed. I’m considering borrowing a friend’s spare PSU to test, but if that fails, I have no clear solution.
Specs: Ryzen 5 5600X, Asus ROG B550-i gaming, 1TB M.2, Samsung 980 16GB, 3200MHz Corsair Sapphire RX 6700XT, NZXT H1 case with included AIO, 650W PSU.
I'll check it again. It seems like a faulty cable might be the cause, since moving the PC often triggers or resolves the problem—especially without any side panels blocking cable movement.
You demonstrated the GPU isn't the problem by testing it on another machine, indicating the rest of the setup was fine. It seems the issue likely lies elsewhere. I suspect the problem isn't with the software or drivers, so double-checking the power connectors might help. Could you share the PSU models from both computers?
Did you verify your UEFI/BIOS RAM configurations? Your MOBO might have altered the RAM frequency and timings, which could negatively impact GPU performance if they set overly cautious values. This doesn't fully account for all your problems, but I’d definitely review the UEFI/BIOS settings. If everything appears correct, use the Event Viewer to examine Windows error logs during the green screens—they might provide useful clues.
The power supply unit in my setup is a 650W NZXT SFX model included with the NZXT H1. It seems it's not sold separately but is a tailored version for that model. The one in the test system is a 500W EVGA: https://fi.pcpartpicker.com/product/zNK7...b1-0500-kr
I also considered it, even disabled XMP once to verify it wasn’t the problem. Disabling XMP didn’t help or possibly made things worse. The BIOS is also the most recent release from Asus. Of course, the BIOS could be corrupted or something, but I’m not sure. Thanks for bringing up the event viewer, I’ll check that next time.
Consider resetting CMOS without reloading settings to check for changes. It looks like the 5600x lacks built-in graphics, confirming the cable isn't connected incorrectly.