I've seen people run over 5ghz stable with liquid cooling/peltier set ups. 5.5 ghz is pretty crazy. I haven't seen much phase change stats for the x6800 although maybe 6ghz is stable at -50 C?
I wouldn't considerLiquid N as stable since you can't get a steady supply of it.
I'm curious about the OC'ing potential compared to the Core 2 Quad (yes, I know its not out). I remember reading that OCing it was just as easy if not easier than the C2D and higher clock speeds were attainable, although you have to get rid of more heat than the C2Ds.
I'd like to see an OCing showdown between the C2D and the C2Q with Price vs Performance as the main topic. I guess thats wishful thinking till Dec/Jan.
ReliReli, I think you're right about that the OCing that people are doing. rawritsdario is right in that no one wants say 2.4 ghz when u can have 3.33 ghz and stable. Why would you? More speed for no extra money is always a good deal.