I have the Asus P4P800-E Deluxe and a P4 3ghz C Series Northwood on it with 1.5 gig of PC3200. I use this computer mainly for compiling large applications and running it as a database and media server. When I have Visual Studio 2005, Sql Studio 2005, Dreamweaver 8, winamp, firefox, and 2 IE instances open....I can some what feel "lag" when switching windows. (I have plenty of ram left..about 768mb). I'm thinking whether to upgrade the processor or not. Based in this link http://www.digital-daily.com/motherboard/asus-p4p800-e/ I want to know what kind of processors this board supports. It says that the motherboard supports socket 478...so would the Intel duo processor be compatible? http://www.newegg.com/Product/Product.asp?Item=N82E16819111180 Some of the reviews for the processor states to use DDR2???? If the processor is compatible, would it be faster than my current processor? Maybe I should just wait for the next intel processor and build a new unit? Maybe build an AMD unit?