As a test case I have purchased this MOBO from New EGG just to see how cheap I could go. I already had Duron 750 CPU.
So far I have tested the following OSes; Windows ME, Windows 2000 ( all three) and Windows XP. Everything works. I have also tested RedHat Linux 7.1, built-in LAN card doesn't work. Everything else works just fine. I kep the PC running for three days.
I thing ECS K7S5A is best inexpensive motherboard.
Sincerely,
AK