I would keep the Northwood because Prescotts are slower per clock, so I imagine your 2.8C would equal a 3.0 or 3.2 Prescott in most areas. And they are much hotter than your current proc, might have to get a new heatsink. And like the others said you could overclock and probably easily hit 3.2ghz , and alot of people can get it higher than that
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Brand name whores are stupid!