That particular adapter has voltage and bus speed detection jumpers on it, so if you wanted to save money by getting a Tualatin Celeron 1100, you could force it to 1.65v and 133MHz FSB (1466MHz) using the jumpers.
PIII Tualatins are fairly high priced, the biggest performance advantage they have over Tualatin Celerons is the bus speed. A Tualatin Celeron (256k cache), when forced to 133MHz FSB, can nearly equal the performance of a PIII with 256k cache.
Lot of people have Tualatin Celeron 1200's at 1600MHz using a 133MHz FSB.
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