as per other similar thread.
http://forums.overclockers.co.uk/showthread.php?p=21047021&posted=1#post21047021
Deception said.
"You can alter the FSB Strap to something like 333 and this should change the DRAM Frequency too. Although I remember my P5Q had issues at anything over 400FSB too, even if I lowered the Multi, it would just BSOD. "
and my post
i thought that, there is usually a way to change the ratio of ram with the fsb.
just had a look at the manual Huddy said above.
"3.4.3 FSB Strap to North Bridge [Auto]
When set to [Auto], the FSB Strap will be adjusted automatically by FSB Frequency and DRAM Frequency. Congifuration options: [Auto] [200 MHz] [266 MHz] [333 MHz] [400 MHz]"
changing these will change the ram speed as well as the dram frequency
manual here
http://www.asus.com/Motherboards/Intel_Socket_775/P5Q_PRO/#download