So I moved my computer to my living room to connect it to the ethernet and then moved it back to my room. When I started up my PC in my room, I noticed that most of the games I was running were extremely laggy which was unlike usual. When I did a benchmark test(User Benchmark test), everything ran smoothly, except it said my GPU was missing. I unplugged the GPU and plugged it back, checked the PCie cables were in and restarted my computer. However my games were still slow, and user benchmark still said I had a missing GPU. Could someone please help me? By the way, this is on a computer I built myself, and it has been functioning well for about 3 months. Also, the GPU fans are spinning while my computer is on, even though it says not detected.
View: https://imgur.com/a/slOQX8Z
View: https://imgur.com/a/slOQX8Z