Glad to hear that its the ASUS software playing up. I am not going to push RAM. Its stable at these settings, so find out if my cpu is stable at 1520 fsb now. Thanks very much for your continued advice Cibic. You've got to appreciate that I only had experience in clocking an ancient socket 478 board before this, and that wasnt really succesful. I chose the wrong board to begin my overclocking, that's for sure. It sure can get you depressed and angry when you are unsure of what you are doing. Especially this little habit of "ignoring" my boot hard drive when I've pushed PLL or FSB further than it likes.

I'll post back when I find a stable 1520 fsb OC, see if my voltages are ok. temps are under 70 degrees on load anyway.