I have this weird issue and i hoep someone will be able to help me. If i use MSI Afterburner out of the box i can clock my GPU up to 1100MHz and MEM up to 1575 MHz. However if i switch to unofficial overclocking mode to get higher frequency limits, both GPU and MEM are at 0 MHz. Why!? And even if i set them to correct frequency of 900/1250 and hit Apply button they jump back down to 0 MHz. It only does this when in unoficial mode. As soon as i removed that string from CFG file, frequency is detected properly again. So now i can't go any higher than 1100MHz which sucks big time. Anyone else having such problem? I'm using MSI Afterburner 2.2.3 and Catalyst 12.8 WHQL on Gigabyte HD7950 3GB WindForce 3X.