Hello,
SPECS:
CPU: Intel Core i7-3770 3.40 GHz
Motherboard: Intel Corporation DZ77GA-70K
RAM: 32 GB DDR3
GPU: NVIDIA GeForce GTX 1080
Monitor: https://www.amazon.com/gp/product/B01IOO4SGK/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
I've recently been having some interesting issues with my PC. It started about two months ago when I took it over to a friends house to play a game together (local only) and as careful as I was transporting it, I immediately noticed massive performance issues afterward. I commonly played Monster Hunter World PC with no issues in the past, but could no longer get above 40 FPS. My Overwatch suddenly started getting 30-60 fps from never dropping below 200. Games that should have never had issues were very choppy. The most peculiar part ended up being that if I turned my PC on its side, I got a decent bit of performance back. Overwatch now gets 120-140, but friends with much lower end builds out perform my system. figured this meant my GPU had not been going in all the way to the physical slot or wasn't properly being dedicated to the games. Maybe my locking mechanism was broken. I moved my GTX 1080 to the other motherboard slot. Same issue. I tried different GPUs (had a spare GTX 960 laying around from my brother) same issues. I attempted to change settings in my games, but to no avail did anything really change. I reinstalled games, drivers, and all that I could think of, leading me to think that either through transportation, the system is having a weird communication between parts bug, or that the physical parts were damaged. All my specs are given above, let me know what other information I can provide.