Graphics card suddenly underpreforming

[fossilizedfossil]

Hey guys so my graphics card suddenly started to under preform. I was playing pubg and I usually run at 80 avg fps on ultra settings. One game it was preforming fine but the next I was barely getting 40 fps. I'm not the best when it comes to computer software so running benchmarks, checking temps and stuff. I only know the basic stuff like how to read a temperature off a screen.

PC SPECS
CPU: Intel core i-7 6700k
Motherboard: Asus Z170-a
Memory: Corsair Vengeance 16gb
Storage: western digital 1 tb hdd
SSD: samsung 850 evo
Video Card: Asus rog 1080
Power Supply: EVGA 650w super nova

 

[Viking2121]

I would start by making sure the drivers are upto date, if so you may have to reinstall the drivers.

If that doesn't help, you could possibly have malware or a virus, A quick free scan with Malwarebytes should do the trick.