Graphical Issues On Start Up

Hi guys. I have a feeling my GPU is dead but thought i'd double check all bases. My GPU was working fine last night and has been for about 2 years or so now. This morning when i turned my PC on, i noticed i saw random artifacts on the screen and, when it got to Windows login, i noticed vertical red lines on the middle of the screen. I reset my PC and switched to onboard graphics and uninstalled my AMD driver and installed the latest.

When i switched back to the AMD GPU, i was browsing normally and all of a sudden my screen changed to like a black and white static page which i couldn't click out of. I'm currently using my Intel integrated graphics which there is no issue with.

Is my GPU dead? Its a AMD HD 7970 Lightning.

Many thanks for any help
Anthony

Thank you so much for the reply. Please can you let me know how I do this? It's an AMD Radeon HD 7970

Thank you very much. I've never used that before I thought I'd just have to go on the Radeon settings.

It just happened randomly though as Thursday everything was working fine. Can VRAM just go like that?

Ah i see. Very strange! It looks like i can change it via Radeon settings:

Can I control the GPU clock and fan speed in the AMD Radeonâ„¢ Software


Just so i am sure, is it the memory clock i toggle down a notch or 2?

Wow so they are known to go like that? I have emailed AMD to see what they say/hopefully get it fixed. Sorry again for the question Mike but would you just go down by 5 on the memory or 10?