While gaming on my computer, sometimes my graphics driver crashes and recovers, and I can still continue playing whatever I was playing, although with a severely reduced framerate. Other times, I'm finding my computer emitting a loud, shrill continuous beep, which doesn't match any beep codes I've looked up, and then it crashes. No sound, no artifacts, it just goes kaput, and I need to reboot it. Could these things be related, or perhaps they are two separate problems?
Specs (everything stock; nothing overclocked)
Mobo: Gigabyte GA-990XA-UD3
Memory: Corsair CMX16GX3M4A1333C9 XMS3 Desktop Memory Kit - 16GB
CPU: AMD FX-8350 with stock cooling
GPU: EVGA Geforce GTX 660
Power Supply: Ultra LSP750
Specs (everything stock; nothing overclocked)
Mobo: Gigabyte GA-990XA-UD3
Memory: Corsair CMX16GX3M4A1333C9 XMS3 Desktop Memory Kit - 16GB
CPU: AMD FX-8350 with stock cooling
GPU: EVGA Geforce GTX 660
Power Supply: Ultra LSP750