There is no standard for DDR2 1066. What the makers sell is is DDR2 800 which they attest/certify will run at 1066 speeds. You will need to set the timings, voltages, and memory divider (speed) to the settings recommended by your memory maker.
I dont have the exact settings infront of me, but the mother board gave me the spd settings for what the ram is stated it should run at, and a reading for what the mother board set it to.
The mother board says that it can read the ram at 1066 in the manual, but within the bios it will not allow me to set it to the correct spd, only partially. I'm thinking maybe a later bios ver. may help?
it gives me an option to set the ram speed, it list a bunch of speeds UP TO 800. I've already changed everything I CAN change, but it will not detect it as 1066.
I'm thinking it's not a huge loss or anything. it is just annoying when the mobo says it can run it, I buy 1066 rated ram, and the bios will not allow me to do so.