Hi there, I have bought a Sapphire Radeon R9 270X and went through the installation process. I then ran a game, the game lasted 2 minutes in total, 2D menus and videos worked just fine, but games themselves would not, as a result, the computer automatically shut itself down and restart or more commonly, I would just get "no signal" on my monitor.
After that, it became worse, I began receiving strange coloured lines alongside freezing whilst browsing on the desktop, which would not happen before.
Overtime, it would stop giving me a signal completely. The 16.6 drivers from the AMD website helped slightly and I could run CS:GO successfully for 30 minutes without failure but once I turned the computer off and on the next, I couldn't get any signal through my monitor on startup. Sometimes the graphics card would become really loud even though I was getting no signal.
This isn't the first time this has occurred, I've had this issue on a previous card, my GTX 660 which lasted ~7 months but EVGA refused to RMA it because it had burns on the gold contact pins but my new card does not have any physical damage.
I've resorted to using my motherboards on board graphics and have no freezing issues when using it. The graphics card failed as soon I installed the drivers so all of this occurred within 12 hours.
My question is, what's causing this issue? I'm fairly convinced it could be another component in my computer that might be causing my graphics card to fail (if possible) because this same issue has occurred on two different graphics cards in the exact same manner.
Thanks in advance.
Additional info:
Temperature:
Idle: 27°C
In-game/Furmark: 67°C
Hardware specifications:
CPU: AMD PHENOM X4 965 BE
MOBO:ASUS M5A78L-M/USB3 (BIOS 1801)
GRAPHICS CARD: Sapphire Dual-X Radeon R9 270X OC 2GB GDDR5 Graphics Card with Boost
GRAPHICS CARD DRIVER: Catalyst 16.6 (previous versions also tested)
PSU:Corsair CX600 (600 watt)
After that, it became worse, I began receiving strange coloured lines alongside freezing whilst browsing on the desktop, which would not happen before.
Overtime, it would stop giving me a signal completely. The 16.6 drivers from the AMD website helped slightly and I could run CS:GO successfully for 30 minutes without failure but once I turned the computer off and on the next, I couldn't get any signal through my monitor on startup. Sometimes the graphics card would become really loud even though I was getting no signal.
This isn't the first time this has occurred, I've had this issue on a previous card, my GTX 660 which lasted ~7 months but EVGA refused to RMA it because it had burns on the gold contact pins but my new card does not have any physical damage.
I've resorted to using my motherboards on board graphics and have no freezing issues when using it. The graphics card failed as soon I installed the drivers so all of this occurred within 12 hours.
My question is, what's causing this issue? I'm fairly convinced it could be another component in my computer that might be causing my graphics card to fail (if possible) because this same issue has occurred on two different graphics cards in the exact same manner.
Thanks in advance.

Additional info:
Temperature:
Idle: 27°C
In-game/Furmark: 67°C
Hardware specifications:
CPU: AMD PHENOM X4 965 BE
MOBO:ASUS M5A78L-M/USB3 (BIOS 1801)
GRAPHICS CARD: Sapphire Dual-X Radeon R9 270X OC 2GB GDDR5 Graphics Card with Boost
GRAPHICS CARD DRIVER: Catalyst 16.6 (previous versions also tested)
PSU:Corsair CX600 (600 watt)