Originally Posted by ny_driver
so the 4400+ is basicly the exact same chip as the Opty 175 @ 2.2gHz.
That would be correct.
I have both, an X2 4200 and a few Optys with similar/same steppings. If you browse around, you'll see folks with chips that have identical steppings between the X2 Toledo cores, Opterons and San Diego cored chips. It's also been said the San Diego chips are nothing more than X2 chips with a dead/disabled core. All of these seem to be based on the same core type even though the core name is different, probrably as a designation towards it's intended stock useage and whether it's setup as a single core chip.
Simply put, X2 is a DC desktop chip, Opteron is a DC server chip and the San Diego is a single core desktop chip.