Game crashing GPU not performing

[Drewvozz]

http://imgur.com/MQ5P2V9

GPU= GTX 750ti
This is my gpu attempting to load a stream. It bursts to the max MHZ and then slows to a halt.
Every game i play crashes after 10 or so min. Some crash my computer and force a restart without any message being displayed. Is this the end of my GFX or is this some sort of internal error?

Solutions I've tried:
- Re-setting my gpu in its PCI
- Changing multicore lighting (Saw someone solved the same problem)
- Dusting out my gpu

Thanks for any responses

 

[Drewvozz]

Btw Temps for my GPU hover between 30C-34C