No I remember you saying something about that in your 680sli thread when you and a few others were helping me with O.C.ing my memory to hit 15K in 3Dmark11. Mine have not had the return to zero bug I had that before with my 6950CF setup but cured ith with a clean install of MSI afterburner.
weird had sli 580 in this rig for 2 years and not 1 problem oc the memory. I`m just going to leave it flashed at 7200. its 100% stable