I have a P4 1.7ghz 400fsb, no idea what stepping it is... but it's sitting on an El Paso (Intel) D845HV (piece of crap) motherboard, with only pc133 ram... and even with a Radeon 9100 128mb video card, runs games (MOHAA, BF1942,CoD) like crap... if I were to upgrade the motherboard, and ram...