Question My fps doesnt change even when lowering settings

Dec 25, 2019
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Okay so i bought this pc, from a guy i know he showed me the performance on destiny 2 and rust, it worked perfectly. He packed my pc up and i went home. So when i came home i reinstalled windows and installled those 2 games. The fps were stuck at 45-55 fps nothing lower, nothing higher. I tried other games the same thing happened. I tried changing the settings, resolution - no change.

So far i tried re-installing my drivers
Reinstalling windows

My specs:
CPU: I3 8100

GPU:RX 580 8GB

RAM: 16gb ddr4

Motherboard: Gigabyte Technology Co. Ltd. H310M A-CF