Can't be temperature issues?
What miner you are using? Try to lower intensity.
Is the Windforce new? Old, long time used GPUs may fail unexpectedly.
P.S. You should be asking in altcoin section ( to move the topic use link at bottom left )
EDIT: I see your MB has only 1 PCI-e x16. Are you using powered risers?
What if you put the windforce in PCIe x16 (alone) is it working?
Can't be temperature issues?
What miner you are using? Try to lower intensity.
Is the Windforce new? Old, long time used GPUs may fail unexpectedly.
P.S. You should be asking in altcoin section ( to move the topic use link at bottom left )
thanks bitfort for your answer.
it was normaly over 90C i refreshed the thermal paste and i blow all dust out with a compressor
now it works fine
i gived fanspeed to 75-80% and he go max to 75C
im using zeccash miner, i tryed the newerst version and the 1.2.3 version.. all the same bad..
the windforce isn´t new :/ i bought it used
EDIT:-> i dont know what you mean with "powered" riser i use normaly riser

you mean to put it on the mobo ? i never tryed.. good think, i will try it later