Graphics crash

[Noggin]

i got the radeon hd 4890
and my graphics keep crashing to a screen with dots & a square , i've uninstalled drivers and reinstalled but still happening.
can anyone help its driving my crazy , could it be faulty ?

 

[Noggin]

i dont know much about computers tbh but i ran gpu-z this is result when i started it and when it crashed when i was playing wow.
hope you can understand this.

2009-11-25 22:48:46 , 240.0 , 975.0 , 60.0 , 25 , 1 , 1398 , 60.5 , 66.0 , 62.0 , 1.4 , 21.0 , 57.0 , 57.0 , 59.0 , 63.0 , 64.0 , 1.1875 , 1.2000 ,


2009-11-25 23:22:22 , 850.0 , 975.0 , 63.0 , 27 , 57 , 1610 , 63.0 , 68.0 , 65.0 , 8.8 , 19.3 , 58.0 , 58.0 , 60.0 , 63.0 , 63.0 , 1.3125 , 1.1500 ,

 

[Noggin]

you seem to know about gpu-z 95thrifles can you see anything wrong with them results ?