I have an ATI XFX Radeon HD 5970 2GB (HD-597A-CNB9) and i run XFX overvolt tool at its max, I can bring the GPU speed from 725mHz to 900mHz with no problem (max factory speed), but when I overclock the memory from 1000mHz to 1350mHz (max factory speed) all my games crash, and loading pictures and videos crash as well, but no problem when exporting videos or images from Sony Vegas, for example.
Could someone please help me?
P.S.: The max memory speed i got without crashing was 1250mHz, and of course i overclock both videocard`s core at same rates.
on top of that the xfx description says to only expect a 20% boost in memory frequency using the overvolt tool and you got 25% so I wouldnt complain about that. its a perfectly acceptable overclock, and you really should not expect to be able to hit 1350