I be very excited switching from my previous sapphire 4870 to this new model , and at first very happy with the performance , huge gap as you can imagine . trouble start a few hour after with a first freeze while play , I start to wonder about my computer , test everything , remove some harddrive , RAM module -lrb- testing with mem86 -rrb- wipe and re-install driver , swithe from one pcie to another , nothing would do , I be still get random freeze , mostly while play but also on the desktop , also I would see display corruption come back from sleep mode . intersting point it happen really random , I try to stress my system with free software out there use all GPU ressource and even CPU and MEM ressource at the same time , no luck , unable to `` trigger '' the freeze ... switch back to my previous card , magic ! no more issue ... -lrb- switch several time between the two card , same symptom -rrb- therefore I have no doubt the problem come from the card -lrb- or some kind of incompatibility with my system -rrb- after a few day search for my problem on the internet I find a interesting topic talk about issue while dual screening -lrb- my case -rrb- more precisely while dual screening DVI + HDMI -lrb- my case -rrb- , I think great ! I find my problem , but sadly ... still no luck and still problem even with one screen . at this point I be wait for my rma number to return the card , I fear I may have the same problem with the new one if it be link to my hardware -lrb- x58 platform win7 64 bit -rrb- I do not know , but this be the first time I be have this kind of issue and I be quite upset with sapphire .