GPU Clock, shader or memory overclocking?

I've got my gpu clocks pretty high sitting around 955 in MSI AB. However I know I can get that higher by lowering my Memory clock which is currently maxed at 2210 with my current core clock.Would it be more beneficial to do that, or leave them all at a balance like this? I'm not sure if FSX takes advantage of the memory clocks at all. Although I imagine it might be beneficial for AA.This thing overclocks like a beast, btw. Got the Accelero Xtreme Plus GPU cooler on mine and temps don't even touch 60c.