Hello Good people


I have just gotten a third Sapphire Dual-x r9 280x

and added it to my set up.  ( Asrock H81M-Plus )



I've managed to get them all running at ~ 715, 719, and 750 khash/s
which I guess is ok..


But the third card seems to drop out after about 45 mins or an hour after starting cgminer.

The temp drops and khash/s drops out to 1.5 , 1.5 mhash/s


I've not iced I sometimes get a message saying "GPU2 idle declaring sick GPU attempting to restart. Idle for more than 60 seconds"

I've undervolted the cards (using Trixx) 2 are on 1.168  , and now I'm trying to set the voltage back to default on the problem card but it still seems to be dropping (it just dropped to 300khash/s)

I'm running a 1000W Silverstone Gold PSU, and have 4GB of ram in the system.



Does anyone have any clues or ideas what it could be? Would gladly appreciate any help

thanks