Hi all, I have the ultra zenith edition board with the latest bios, very simply and AMD Athlon 1400 will post on it a Palamino 1800XP(1533) will not. I have tried resetting CMOS changing video cards memory etc, using different slots stripping it down and the only way it will work in any config is if i take the 1800 out and put the 1400 in. Suggestions please. Cheers