Just installed an 5000+ Black Edition into my Asus M2N-E motherboard, upgraded the BIOS, etc, etc. Set the CPU Multiplier to 14 and the BIOS shows the CPU is running at 2800mhz. Once I've booted to XP, CPU-Z (Version 1.41) shows the Multiplier as being set to 13 and the CPU Speed as being 2600mhz. Windows System Information is showing the CPU at being at 2800mhz.
I tried changing the multiplier setting in the BIOS and I've had it running at 3200mhz according the BIOS and XP but CPU-Z still shows 2600mhz
Thanks for the quick reply, but I've solved it. I had disabled C'n'Q from within windows, but as soon as I disabled it in the bios it took the multiplier changes I made and everything shows the correct CPU speed.
I should have known better, the M2N-E had the same issue with an earlier BIOS version regarding C'n'Q. I would have expected Asus to improve the BIOS over time, not re-introduce old problems