Help w BSOD(atikmpag.sys)stopcode:Video TDR FAILURE

[xferminx]

i own an AMD R9290, overclocked it and would get 70c or below 80c temps.
one day i realized it spiked around 90c, so i stopped OC'ing my card.

then my PC would boot but no visuals at all... i realized if i changed the DVi cable to the second port i could see, but this time i would get the BSOD w the stop code listed in the title.
Why wouldnt the first dvi port work or show anything at all anymore?

i tried running in safe mode, uninstalling drivers. cleaning the card.
my only solution so far has been downgrading to my old HD5800 crossfire setup. This runs fine and havnt had any problems at all.

would appreciate any help,

MoBo- ASUS p6t
CPU- Intel i7 920 @ 2.67GHz
GPU- AMD SAPPHIRE R9290 4gb
RAM- 3x 2gb kinsgston
PSU- Corsair TX850w

 

[scout_03]

this look like from the overclock that the r9 290 went out try it in another sytem aand if you have the same error your good for a new gpu .