老兄
這是要看核心, 不是看名字
所有 intel 的 i586 以後的 cpu 都叫 Pentium, 名字上只是改變一點. 主要是看核心的命名
E5200 則是 Wolfdale

Wolfdale is the codename for the E5000 Pentium Dual Core and E7000 and E8000 series of Core 2 Duo desktop processors, which are similar to the Penryn and Yorkfield XE dies and succeed the Conroe dies. Released on January 20, 2008, the chips are manufactured using a 45-nanometer process and feature two processor cores. The E7200 model, operating at 2.53 GHz, has 3 MB of L2 cache and a 1066 MT/s FSB; the other models, operating at 2.66 GHz, 3.0 GHz, 3.16 GHz, and 3.33 GHz, each have 6 MB of shared L2 cache and a 1333 MT/s FSB. The processor includes the SSE4.1 media extensions. The E5200 runs at 2.5 GHz and has 2 MB of L2 cache, replacing the E2000 series of Pentium Dual core chips.