Video card problems flickering going blank

[oddjob]

About a month ago i bought myself a Gainward ATI Radeon 4870 512mb Golden Sample, i sent one back to overclockers because it was going pixely flickering and going blank. I got another one and now its just flickering and going blank. I've reformated now and its still doing the same thing. It seems to do it when your in a middle of a game or when theres a lot of graphic detail. It flickers for a while then the screen just goes totally blank. The Temp sits at 55C-65C. I've tryed a Sapphire ati radeon 2900xt on Crysis @ VERY HIGH and max resolution yes its very slot but i played the demo right threw without any flickering or blank screen.

CPU: Intel Quad core @ 2.83ghz 12mb cache
Motherboard5E3 Premium/WiFi-AP@n
Memory:OCZ 1066 1333mhz DDR3
PSU: 1000w Antec

 

[oddjob]

Yeah same as me exactly the same but i dunno about the clock values mine is in turbo 775mhz amd 1000mhz

 

[oddjob]

I sent my first card out and they replaced it when i sent the 2nd one back out they sent me it back saying nothing was wrong with it but im still getting problems with it...... need help....

 

[oddjob]

Contacted overclockers getting a refund this will be the third time now. I would get a refund as i've already had 2 new cards and they do the exact same thing