I contacted ASUS support UK but they were too unhelpful for me to waste your life with the story suffice to say they basically said go away and return the M/B. Great eh?
Yup...this is why I don't choose ASUS anymore...their tech support is horrible, I got about the same when contacting ASUS and I got a horribly pieced together english sentence from some guy in taiwan who was 'tech support' all he could say is 'BUY NEW CARD!' cause my graphics card wouldn't work in it...losers....
It's not uncommon for you to have to change your FSB to the correct speed when buying a new motherboard however. I have an AMD 2400+ XP and by default it's 15x133 but the motherboard defaulted at 100 so it was saying I had a 1.5GHz 1800+ XP chip until I changed it to what it's supposed to be.
I don't know anything about intel though. Do you know what the default multi and frequency is supposed to be? Cause if it's 3.2GHz and you want to run it at the speed to get a 1:1 with your RAM then you'd need to have your clock frequency set at 200 and your multiplier set at 16...that'll give you 3.2GHz and give you a 1:1 ratio with your PC3200-400MHz (2x200) RAM.....if it's only running at 266.......then it's running at PC2100 speeds for whatever reason. Find out what the default of your chip is supposed to be and change it appropriately in the BIOS....then it should recognize the RAM after you get the CPU straightened out