For low power - read High Power !!
Celeron E1400 good, all others below bad
SLAR2 2 GHz E1400 2 800 MHz 65 nm M0 512 KB LGA775 06
SLB9V 2.70 GHz E5400 2 800 MHz 45 nm R0 2 MB LGA775 06
SLB9Y 2.80 GHz E7400 2 1066 MHz 45 nm R0 3 MB LGA775 06
SLAPK 3.16 GHz E8500 2 1333 MHz 45 nm C0 6 MB LGA775 06