HI guys,

Apoloies for the delay in replying, but I've been quite perplexed by this for a while....

After a bit more digging it seems its a BIOS problem, I posted the same details over at the AMD forums, and also did a bit more trying things, and theres even an example of a 5GHZ CPU speed where another user tried the same thing, using a x25 multi....

So all my dreams were shattered...!!! :sob:

I also came across a post where someone has used ntune to change the HT Multiplier which was another problem, and I tried this after re-setting the BIOS back to defaults.

It did seem to change my HT link to 1000MHz, but then another problem cropped up, random BSOD's "Clock interrupt request not received from secondary processor in allocated interval"

This was with a ntune OC to 210 x 11 = 2310MHz and 1050MHz HT Link

The BSOD initially happened after the 2nd CPU test in 3dmark06 had completed, but is now happening even when Vista idling with nothing running...

And another user has tried the same workaround and has the same BSOD problem.

So it seems as though its still a case of waiting for a better BIOS from ASUS... so I'm giving up on it for now and following Aussie's example and putting my 6400+ back in until either ASUS give a working BIOS, or I get a new mobo, whichever happens sooner.......