wat r u guys talking about???the fastest xp is 2.2ghz and thats the xp 3200. theres 2 xp models. the 266 fsb wich is at 2.13ghz and the 333fsb wich is at 2.08ghz. the athlon 64 2800 is 1.8ghz. there are tons of athlon 64s that are 2.4 ghz http://www.newegg.com/app/ViewProduct.asp?submit=property&DEPA=1
and as 4 2.3 i dont think there are any.