The Wolfdale-3M family is, as you may have guessed, a cut-down version, and as the name alludes to, these processors feature a smaller 3MB L2 cache and a 1066MHz FSB. With the Core 2 Duo E7200, Intel is offering a 45nm processor that is considerably more affordable than the cheapest Wolfdale (~$180), and even undercuts other budget oriented models such as the E6550 that roughly costs $160, while the E4700 is also more expensive at around $140.
The Core 2 Duo E7200 operates at 2.53GHz, making it slightly slower than the E4700, though it will make up for this with a greater FSB speed and extra L2 cache. More importantly as a 45nm chip it inherits the added efficiency the original Wolfdale CPUs are known for.
http://www.techspot.com/review/100-intel-core2-duo-e7200/
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