Crashing! Mostly when idle, lasts longer while gaming.

Eddie_60

Prominent
Jul 29, 2017
1
0
510
I traded a macbook air for an entry level gaming desktop so I could give it for a could friend of mine. This desktop has been having problems left and right. Two weeks ago, we found out the "SSD" wasn't actually an ssd, but some cheap laptop hard drive. Since we've been using the desktop, it's been crashing all the time, mostly if casually browsing youtube, but lasts hours while gaming. What could the problem be? I know for sure that one of the ram slots is bad.Can the motherboard be the issue?
GPU: R9 270x
CPU: AMD FX-8320
Motherboard: A990FX

Any help would be greatly appreciated, thanks!