This looks like a hardware issue, maybe heat, maybe a bad videocard, maybe power, or motherboard. Does Windows' event viewer tell anything useful?
Now ask your hardware expert friend to find the cause.
Kees
Hello everyone,
Lately, my computer started crashing after 5-30 minutes of activity. One day it was working just fine, but the next it started to have problems. It is homemade (put together by a friend of mine) and is about a year old.
What I did notice about the crashes is that it doesn't always crash when I'm only using my SSD. For example, I installed League of Legends on my SSD and my pc doesnt crash when I'm playing it. But I also installed Hearthstone on my SSD and then my pc does crash.
Also, to describe the crashes, sometimes the screen just goes black, and my screen shows it doen't get a signal, and sometimes the screen just freezes.
Specs:
AMD FX(tm)-6300 Six-Core Processor 3.50 GHz
8.00 GB RAM
64-bit, windows 7
NVIDIA GeForce GTX 760
1000GB HDD
Things I already tried:
- Updating drivers
- Check for malware with AVG and malwarebytes (no problems)
- CHDSK disk check
- Memtest86
- Probably something else but I can't remember anything I did
I hope someone can help me with my problem
-Bewker

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic