Hi there,
Here is the goss' on celeron support, direct from Asus:
" Does CUV266 support Celeron 1200 processor?
Due to Celeron 1200MHz uses Tualatin core and not Coppermine core, our CUV266 cannot support it. "
Chuck in your details on this page and you will see what CPUs it supports:
http://www.asus.com.tw/support/cpusu...pusupport.aspx
The highest are 1100mhz coppermine celeron and 1000mhz P3.
Hope that helps.
Elad.