I be on my second 670 . the first one would lose signal to the monitor on just go into the nvidium setting or play Diablo for then 5min and that game be not intensive . I of course try the official and beta driver . waste a day try to figure it out but realize it be the gpu so I rma it to amazon for a exchange . now come the second one . which start out promising , I be able to play Diablo for a hour but then I get a Nvidia openGL lose signal to display error . research online its a error that the gpu do not respond back to the os in time . really ? this new fast gpu can not respond in time for the os . the advice give to fix this be to up the time the os wait from the default of 2 sec . I do 10 which should be more then enough since the default be 2 . I reboot and start gaming and within 30 min same error . this be again with Diablo . so after more research I find a program call furmark to test the gpu . within 10 sec run it , the program crash with the same error . I could not even finish the test . I run it 3 more time with the same result . I finally give up and go return this for a refund . go to be play with my onboard gpu since that do not give I any problem .