I would try a google search for the motherboard. The Epox site seems to
work sometimes but not other times. I don't think there's any support any
more. I got into the USA site but it wouldn't download the user guide for
the non-pro version.
An Epox CPU support chart I have dated Dec 2006 shows 2800+ as the highest
speed for Sempron support for this chipset (or any other chipset).
http://www.epox.com/USA/index.asp