ragheb,

if BIOS settings don't save properly: clear CMOS with switch on IO panel and re-enter settings manually (not from a saved USB profile), or reflash BIOS and enter settings manually. I've always needed to reflash though.

I couldn't get stable on 0501 with CS3222271, I've only found Memtest stability on 0403 and 1001 for these settings.

You are correctly running 1:2 for the posted 450FSB settings. 5:8 is the next ratio down on the 333 strap. If you can stabilise at 450/1:2 (900mhz), then the memory itself will be ok for 563/5:8 (also 900mhz).

563/5:8 gives same Everest Read and Latency scores as 475/1:2, but is achieved with a lower memory clock and vDIMM.