Graphic troubles R9 270X

[voreo]

I dont know if it was just a one time thing or what, but upon exiting a game which was having its own trouble, the problem persisted to the desktop, it only really seemed to happen when i hovered over something.

Example : In power options, hovering over my power scheme made a white box with jumbled text in it, whereas if i wasnt hovering over it randomly flashed smaller white boxes around that same spot. Could this just be my HDMI Cable going bad or something else? Or is my graphics card not getting enough power? My hardware is on my profile

Edit : Ive ran memtest, nothings wrong there, it disappeared after a reset, most benchmark software performs as it should, i only see a similar issue in 3dmarks last test. Also i notice my taskbar on my second screen wasnt showing completely , at least its background, but that fixed itself on turning off taskbars on all screens/turning back on. Im on graphics beta driver 14.2 v1.3

Edit 2: Ran Prime95 / Valley Benchmark at same time, system stayed stable, ran both for an hour , will run longer only if recommended

edit 3 : reinstalled directx and updated, ran SFC/DISM, hoping at this point its down to cable/driver issue
also ran FurMark for 15 mins on max settings

results of the xtreme burn in
http://imgur.com/IALxJon

 

[voreo]

Also seeing corruptions on alt tabbing out of other fullscreen games, but not as often and redoing it seems to fix it.
Is this just something normal with some fullscreen games?

Though that doesnt explain why a fullscreen windowed game behaves this way without alt tabbing

Edit : Added post above to this one, removed old

I also ran Heaven from UniEngine since it decided to work this time

Unigine Heaven Benchmark 4.0

FPS: 27.2
Score: 685
Min FPS: 7.0
Max FPS: 59.9

System
Platform: Windows NT 6.2 (build 9200) 64bit
CPU model: AMD FX(tm)-6300 Six-Core Processor (3511MHz) x3
GPU model: AMD Radeon R9 200 Series 13.350.1005.0 (2048MB) x1

Settings
Render: Direct3D11
Mode: 1920x1080 8xAA fullscreen
Preset: Custom
Quality: Ultra
Tessellation: Extreme

I did not see any corruption or flashing boxes
Im so confused D: