它的型號是：SL5Sx，並不完全等同於Mobile Celeron的SL5SN
可以參考這裡說明：
http://en.wikipedia.org/wiki/Pentium_III
Microsoft's Xbox game console uses a variant of the
Pentium III/Mobile Celeron family in a Micro-PGA2 form factor.
The sSpec designator of the chips is SL5Sx, which makes
it most similar to the Mobile Celeron Coppermine-128 processor.
It shares with the Coppermine-128 Celeron its 133 MT/s front side bus,
128 KB L2 cache, and 180 nm process technology.

這一篇文章寫得很清楚：
http://www.vanshardware.com/article...On_Xbox_CPU.htm
是特規的CPU，當然...要說它是Celeron加強版/Pentium III弱化版也都行