Problem ATI Radeon HD 4870 white dots

Well the first thing I am new and nothing to see that this xDD

I tell you my problem that I imagine that anger here but because I already lost and ...

I have purchased a ASUS 4870, the drivers got 8.7 and my problem is that in the Crysis more than anything I get white spots, especially inside buildings ... on the walls, but only if there are shadows, if you do not go off the white dots, and leave enough xD, between the owner of the store to which I am going and I have been trying to find the problem, even a change of nox 700w to a modular LC8750 Prophecy of 750W but the problem persists, lei in several sites that could be the amp but I imagine that with two rails to 26 amps each enough, or are we going according to my calculations I abound, also in the Medal of Honor Airborne I get white spots, though not as much as in Crysis and Also in the shadows, in this case on the floor, the card has no OC and no more playing 75th, the ati tools 0.27b4 Artifacts not detected by any side, my plate is a ep35-ds4 all updated and my cpu to a Q9300 3.0 Ghz also could be the problem of the port PCIe but I have no desire to switch plate, if anyone knows or imagines something that might be or what's happening or simply to provide feedback and comment that can not be done!

Place a screenshot in the question, but I think they are Artifacts, drivers should be solved by changing them

uninstall the drivers and install everything again if it ..... Caring for all of the above files are erased with that well ... should be ready.

Format before you put that card? ... Because of cases in which the VGA has errors because the OS will stay glued to the previous card