I have two brand new cMBPs with the 1gb 650m (both) and i've noticed how horrible the stuttering, jittering, jerking the graphics in Boot Camp. If this was happening to just ONE of my cMBPs then i'd understand that maybe its just the one.. but both of my units are acting identically. Overclocking doesn't fix or improve anything, it happens on all games and all benchmarks i've ran. It looks horrible... Noticed how bad the 650m was behaving when I compared it to my Samsung notebook with 650m.. It's night and day smoother on the Samsung. I'm running the same exact drivers on the Macbooks as well as the Samsung and the Samsung is silky smooth compared to both Macs.. I'm not sure what's going on here. The Samsung does have 2gb of video ram compared to the 1gb in the Mac but when looking at MSI afterburner during gaming, it's not even coming close to using the full 1gb of video ram on the Mac so that can't be it. The funny part is that the Macs are getting higher benchmark scores against the Samsung, but it's so choppy so it looks a lot less playable and annoying over the Samsung. Anybody experienced this? I wonder if I should try different drivers again.