I have a K7VTA Pro V1.0 with an Athlon XP 1800+ (Palomino) processor. I was running it with the CPU FSB at 100MHz (I didn't bother changing it when I first set it up.) I recently tried putting the FSB to 133MHz so that the processor could run at it's fastest speed. However, when I did this, Windows XP refused to boot, giving me random BSOD STOP errors shortly after the splash screen displayed. I tried an Ubuntu 5.10 live-cd, but it would never get past decompressing the Linux kernel, or it would just get kernes panics. I flashed the BIOS to version 2AB2, but that made no difference. Once I set the FSB back to 100MHz, everything would work just fine.