I also hav same mobo and wanted to try out OC switch so i set it to 10% oc and even enabled oc gine at bios when i started my pc my CPU was running at 3080Mhz stock is 2.8Ghz but it didnot OCed my gfx card ?? i used 3dmark 06 and got 25 points boost only with easy oc switch like i said it did nothing to my gfx card
That's because it has nothing to do with your gpu.
Try MSI Afterburner for that.
Plus i agree with the above members manual oc in your bios.