hmm should be able to do ddr500 speeds fine ,
i have mine like this
same ram as u and motherboard
ram i have at 2.55v
cpu 1.4 bios reports 1.38
11x250 or 10 x 250 does it fine
4 multi
but when i want to oc ram more, but i usually run at stock(ram) but its stable with settings below
i do 10 x 290
ram at 2.66
cpu @ 1.45
multi 3
some reason when i set voltage @ 2.5 or 2.6 bios reads it at 2.55 or 2.66 =/