The Intel Core i7 920 should overclock pretty good as it is basically the same CPU as the 965 locked to a 20 multiplier with a 133MHz Base Clock frequency. Using the ASUS P6T Deluxe board we upped the voltage from 1.208V to 1.344V and the PLL Voltage from 1.80v-1.96v. Due to the CPU being locked, the multiplier was kept at 20 but the Base Clock Frequency was upped to 200MHz by the time the overclocking was finished. 4GHz on air with the 920 is very respectable.

Standard Core i7 920

Overclocked Core i7 920
Overclocking the 3.2GHz 965 on the other hand was made easier by the unlocked multiplier as you can change the multiplier up or down and change the base clock frequency at the same time. The first try at 4GHz was a success with a multiplier of 25 and a base clock frequency of 147MHz. The maximum stable overclock I was able to get on the 965 was just a tad higher than that at 4.12GHz. This would seem to mean that the 920 at least in our testing is the best value for the money.

Standard Core i7 965

Overclocked Core i7 965