The chips come with their GPUs disabled and can be identified by the model numbers 2550K, 2450P, and 2380P. That first CPU features a fully unlocked upper multiplier, so it's the one you'll want.

Versus the existing Core i5-2500K, the 2550K offers 100MHz increases in base and Turbo frequencies, bringing the chip up to 3.4GHz with a 3.8GHz Turbo peak. Those speeds match the Core i7-2600K, which offers additional cache and Hyper-Threading support missing from the i5 series. Intel is selling the 2550K at $225—$92 less than the 2600K and a $9 premium over the 2500K.