If you want a large chunk of performance added, this may be an option
http://www.ebuyer.com/customer/produ...duct_uid=55333
According to the CPU support list, a Duron 1800 seems to be supported, and unlike the old Duron 900, this is based on the XP core, with SSE support - and THIS Duron is a 266FSB CPU, so it makes good use of DDR2100 RAM speed
The next 266FSB CPU they have is more than twice the price, as 266FSB versions are becoming rare, with the Socket A Semprons running at 333FSB
If you want an upgrade CPU for that board, you need to decide pretty soon!