601 bios has some holes that 511 didn't have for me... can't post at all between 1840-1930

also, seems that this bios disables P1 and P2 sooned than 511 did. Running 601, my r/w/c and latency dropped considerably at my 24/7 oc @ 460 fsb. had to manually enable P1 and P2 to get the performance back.

not sure I'm a fan of this new bios - back to 511 for me