I've been trying to help my brother with his slow desktop for a while. I've checked his HDD usage and it's not a bottleneck, I've checked RAM and it's not too high and also no errors when checking memory. The temps are also fine. According to task manager his CPU usage is low but is clocked around .8GHz. The thing that's throwing me off is that in games it runs fine, but on the desktop it's painfully slow which for the specs it should not be.
Specs:
i7 4790k
24GB RAM
980Ti
250GB SSD
320 7200 HDD
Specs:
i7 4790k
24GB RAM
980Ti
250GB SSD
320 7200 HDD