I also have the same problem.
I bought some Kingston Hyper X and should work to 1066mhz but my system is only working as 800mhz ive tried overclocking the cpu a little by changing the FSB but the system then wont boot.
Surely there must be a resolve to this. Ive been told some gigabyte motherboards have higher options than 2.00B and 2.40B but we dont and i think this would help.
I am running a a intel q9650 which has a 1333fsb which is more than enough for the memory to go 1066
any ideas anyone