Originally Posted by lancorp
I think the "G" version is a Dell dream, probably just a BIOS switch.
Basically, the T7600G processor is the same as the T7600 except the multiplier has been unlocked. If you look at the Dell blog, there is a video of an engineer who is showing the overclocking options for the M1710. You can tell that the T7600G has an unlocked multiplier due to the overclocking options of 2.33, 2.66, 3.00, 3.16 (multiplier's of 14x, 15x, 16x and 17x) Usually Intel hardwires the multiplier to be locked- except on the Extreme Edition's of their processors. The point is, if you're going to spend top dollar on the best processor, you want to get extra features out of it, which is why Intel usually unlocks their best processors.
It would seem that Intel has made a special arrangement with Dell to provide unlocked T7600's (much like engineering samples), but not make it into a retail product, hence why Intel says the T7600G doesn't exist.
Therefore because the 'regular' T7600 would have a locked multiplier, they would be no way you could overclock it in the Dell BIOS. You would have to overclock the FSB which nobody can seem to do as nobody knows the correct PLL that Dell uses (**if anyone does have any information on Dell PLL's we'd love to hear from you