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.
You live at the forefront of technology, and you won't settle for less from your favorite software. That's why AMD is proud to bring you the AMD Athlon 64 processor, with AMD64 technology for dramatically higher performance and built-in support for future 64-bit applications - even running 32- and 64-bit software at the same time. Maximize system efficiency and stay ahead of the curve with the technically superior PC processor, packed with advances such as HyperTransport technology and an integrated DDR memory controller. Whether it is for business, school or play, with the AMD Athlon 64 processor, you can address your current and future computing needs.