I bought this CPU a year ago, and it was a 3700 KAB1E stepping, one of the gems of this CPU is its massive overclocking potential, with the KABxE series being the pinnacles, as such i have maintained an overclock to 3.07 GHz, making this faster than the £500 FX57 CPU, all for free!
This CPU is 2.2 GHz with a 200 MHz FSB like all Athlon 64's and has a multiplier of 11x, however you can lower this but not raise it.
This CPU isn't too quick anymore, but for a budget single core its nice and cheap, and can still put up a fight when overclocked, and is a great upgrade if you have a socket 939 motherboard as you can upgrade your CPU without needing a new Mobo/Ram.
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Stability
Very stable
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