GA-EP45-UD3L Mobo, Dominator RAM & QX6850 cannot run DDR2-1066

I have a Gigabyte GA-EP45-UD3L P45 Socket 775 ATX Motherboard with a QX6850 - originally I had 2x 1gb Crucial pc2-8500 - wanted to upgrade so I went with 2x 2gb Dominator TWIN2X4096-8500C5DF

As soon as I got home and installed them, got random blue screens, boot loops - ran memtest found no errors - ran pc check and found that I would get random chaotic/microtopology errors depending on what sticks I had in what bank - I changed them to back to pc2-6400, ran test's no errors what so ever in 2 passes - I was hoping to utilize the full 1066mhz - I can't seem to get the overclock quite right keep getting BSOD's - although what is the most interesting is that the crucial memory required no BIO's adjustments but automatically runs at pc2-6400 - when I looked up dominator memory it is in fact on the approved memory list for my motherboard and the only 2gb stick really listed

Is there specific voltage adjustments I need to make to have the ram speed run on auto - I have already tried both 2.1v and 2.2v with no luck.

Being on the noob side, and please someone correct me, because my chip has a FSB of 1333 - I can only get the 800mhz memory speed using stock cpu speed?

This has been an absolute nightmare, your help is much appreciated!

Do a "Load Optimized Defaults" from the BIOS; it should pick up the advanced parameter set stored on the RAM itself, and set up the memory correctly; save, exit, reboot, and re-enter the BIOS; go to the "MB Intelligent Tweaker(M.I.T.)" page, cursor down to the ******** Mother Board Voltage Control ******** section, verify that "DRAM Voltage" is set to "2.100V"; and, at the same time, you might 'bump up' the "MCH Core" to "1.200V" - won't hurt anything, MCHs (northbridges) are designed to 'run hot' - and often contributes to stability with recalcitrant memory... Save, exit, reboot, and see whatcha get!