Which RAM do you think is better out of the Corsair 4GB (2x2GB) DDR2 1066MHz/PC2-8500 Dominator Memory Kit CL5(5-5-5-15) which i believe is 2.1V at 1066? OR the Corsair 4GB (2x2GB) DDR2 1066MHz/PC2-8500 XMS2 Memory CL5 2.1V also does the xfx 780i board support 1066?? i'm fairly sure should be fine just wondering.. and also if i get this ram since i will be running cpu at 4ghz thats 445 clock so if i had 1:1 sync my ram would only be at 890Mhz?? does this mean i should just set it unlinked and leave the RAM at its 1066 settings??