gpu oc problem

[Manos]

when i try to run furmark to test my gpu pc crushes. Gpu tweak is on default settings so no unstable oc i have a asus 7870 and the latest drivers. i had oc my card before with no prob but now after the format i cant guys HELP

 

[.Im#NuMBeR1]

Could you give a bit more information for us to go on?

If the system crashes, it may indicate an unstable GPU. What sort of "changes" occured before, during and after the format?

[Manos]

nothing much i dont rembere  changing something. I dont have any problems playing games so i guess it crushes only when i run furmark thats all i know

[AMD_Nemesis]

Some benches dont stress the gpu as furmark does, leading you to belive its stable, But actually it is unstable, also please tell me your clock speeds and your voltage with and without oc.