Since the controller is on the chip the actual memory speed seems to play less of a factor. I have an a64 3000+ on an ak86-l. I've tried 266, 333 and 400 plus overclocking at each setting (228fsb seems to be tops for the ak86-l I have). I have run every standard gaming benchmark, aquamark, 3dmark01 and 03 as well as sisoft. All in all the biggest difference was in sisoft on the memory test. But it didn't translate into much on the actual gaming side. Could be a mute point since I haven't gotten my 6800gt in yet, so I'm running a 9500pro @ 381/334. I plan on rerunning everything again to see if there is a bigger increase at the different memory settings with the new graphics card. Many other ppl have noticed the same thing though. Memory speed doesn't seem to translate into as much a performance gain as it used to mainly because the controller is on the cpu now.