[reboot]

No, not at any speed.
Even at absolute zero (0 degrees Kelvin, -276 F (i think)) the CPU is only capable of running at a certain speed.
Sure, it's going to be MUCH faster, the colder you can get it (do some research on superconductivity), but the traces on the chip (currently .18 micron in most) can only conduct so much juice at any given voltage, no matter what the temperature, before they simply burn/melt.
More voltage equals more heat. More cooling equals more speed. Somewhere there's an algebraic equation that would work it all out, but there's too many random factors...anyhow, the answer is no.