If I remember correctly RH used to have a problem with some Athlons.... I thought it was fixed, but you might want to try this anyway....
At boot up, when your boot loader starts, add the parameter noathlon. I always did this with lilo, I'm not sure how to do it with grub.... but if you're using lilo, hit Ctrl + X at the lilo screen, then type noathlon and Enter.....
If that doesn't help, then you should post all the errors you're getting.
HTH
|