Hey guys, I'm very disappointed with these cards atm.. lol, they are both reference PCB's but are blue colored... I've softmodded their voltages to 1.158 using the CCC profile and tried auto tune. Auto tune ends up at 690-1190 .. its runs fine for half an hour or an hour, only with a small amount of artifacting but then it stops responding after a while. WTF is with these cards!? .... Is there another way I can soft mod these cards or improve its oc? right now its stable at 660/1050 more core clock will end up in a black screen no signal after a while.