I just put an AMD 2400+ (2.0GHz, 333 FSB) into an older MotherBoard: Asus A7V (Athlon 800MHz, 133 FSB). When I first booted the machine it showed up as a 700MHz CPU, so I updated the BIOS and now it won't even POST. I tried another 1.5Ghz chip from my dads machine and it just starts beeping as soon as I boot it up and does nothing else. The new chip works on my dads machine with no problems.. Machine works just fine with the 800MHz chip replaced into it... Anyone have any thoughts?? *disclaimer: I'm not a computer genius by any means please help!