I've currently got a pcchips with via chipset pc400 mobo capable of 2gb of ram (4x512mb sdram) and currently runs a celeron 1.7ghz cpu. I don't now the exact model of the mobo yet (away at work), so I can't check the compatibility on the web yet. I'd like to know what's the fastest CPU I can strap onto that mobo, cuz I'm hurting with the 1.7ghz celeron. I figure I can get something better from ebay or froogle searches. All help greatly appreciated. Will update with the model asap.