It seems that Intel must have a stack of chips with faulty graphic processors, but instead of scrapping them it's simply disabled the IGP and is now selling them on at a reduced price, probably shifting the last of the Sandy Bridge processors before the arrival of Ivy Bridge.
Boasting four cores and the ability to process four threads simultaneously, the most expensive chip out of the three Core i5 models is the SandyBridge-unlocked Intel i5-2550K clocked at 3.4GHz with a 3.8GHz maximum Turbo Boost speed and a 6MB L3 cache. Priced at $225/170 Euro, it’s a slightly stronger alternative to the Core i5-2500K (3.3 GHz.)
The Core i5-2450P and i5-2380P are priced $195/148 Euro and $177/134 Euro respectively. Both CPUs have 6MB L3 cache and slightly different stock and maximum turbo speeds, with the i5-2450P clocking from 3.2GHz to a maximum of 3.5GHz and the i5-2380P from 3.1GHz to 3.4GHz.
Intel has also release four new Celeron micro-processors, the Celeron B815, B720, 867 and 797. The Celeron 867 and 797 are the most expensive of the chips, priced $134/102 Euro and $107/82 Euro respectively. The 867 boasts two cores, carries 2MB of L3 cache and runs clock rates of 1.3GHz. The lower-priced 797 chip runs clock rates of 1.4GHz on a single core with 1MB L3 cache.
The dual-core B815 costs $86/65 Euro runs at 1.6GHz with 2MB of L3 cache, while the single core B720, priced $70/53 Euro, is clocked at 1.7GHz with 1MB of L3 cache.