Fastest CPU for an Iwill KK266/KK266-R

[Super6]

Assuming the latest bios what is the fastest processor supported by this motherboard?

Thanks.

Super6

 

[Cerb]

If it is a KK266+, it should handle Palamino and Morgan CPUs.
If it is the plain KK266, Thunderbird (Athlons up to 1.4GHz, no PR rating) and Spitfire (Older Durons).