just orderd a ati his 5870:) in Custom PCs, case mods, overclocking Posted March 16, 2010 · Edited March 16, 2010 by gordesky1 hmm is it possible that my card is locked from overclocking? cause if i try overclocking the core and the memory at the same time from either overdrive or msi or even amd gpu tool it will go on a blue screen. i just reflash again.. and put all the clocks too 875 and 1235 memory and so far its not crashing from overclocking in the bios. so something is telling me its either drivers or the card is locked. i can overclock the core in overdrive but as soon as i higher the memory 10mhzs it gets unstable and blue screen with lines. im also gonna try the card in my 939 socket pc and see if i have any of these problems on there.