I have built three systems using this board, all three have been very stable. Yes you can use Duron's on this board, the BIOS defaults to a 100 Mhz FSB, so if you use a 266 processor you need to change it manually, it won't auto-detect. The ECS website has good info on which BIOS is needed to recognize processors above 1.2 Ghz. I would rate this board a 7 or 8 0ut of ten. There are many websites that have done reviews of this board and the are all favorable. There are no real overclocking options though.