1066mhz 4GB ram upgrade from 800mhz help

hi guys, just upgraded from 800mhz 2GB (2 channel) to: 1066 mhz 4GB,
(my mother says it can support DDR2 1066)

After installing the ram i notice on the "post screen" it said DRAM clocking = 800 MHZ,
so after a few google searches i done this:

changed RAM voltage to 2.10000
changed the RAM frequency to manual and set it to 533MHZ

after that, "post screen" showed DRAM clocking = 1066,

does this mean i am running 1066 mhz ram now?
i did not change any latencies because in my bios theres 20 settings rather than the few 5 5 5 5 15 or watever, so didnt change it incase they werent the right settings to adjust,

thanks guys, gold badge up for grabs here :-)

ok cool thanks!

Well how do we know if 2.1v is right, you haven't even told us what ram you have. lol.

sorry , its actualy on box says 1.9v - 2.0v, its silicone power X-power, so i changed from 2.1v to 2.0
(now writing in text is pink not red (for voltage)

for some reason when i select an auto overclock profile of only %7 i get an overclock fail,

could this be my power supply not having enough juice?

500psu

m2n68 MB
4890 OC
AMD 720 BE x3 core (black edition phenom)
x2 HD's
x4 case fan's

used to run fine with the 800 MHZ at cpu over clock %7 , possible new ram uses that little bit extra power to not have enough juice for cpu?

-getting new powersupply today anyway, want bit more room for additions)