Yeppers, the 1.8A was a good overclocker back in it's day. There were two 1.8 P-4 processors, Willamette with 256k cache which is not that good and the very sweet Northwood 1.8A with 512k cache. Even the older B0 stepping 1.8A will usually run at 133 FSB for 2.4 gig. If you luck out and get a C1 stepping, then 3 gig or more is possible with good cooling. The only thing is, these older P-4's don't have hyperthreading.