i have a few PM's concerning how i go about overclocking DDR3 ram on my EP45T-UD3R?
it was Crucial value 2x2GB ram kit with Micron D9JNM IC's that i used, i found the ram clocks very well on the boards.
also, i saw friends of mine running Crucial value 3x1GB (that comes with Micron D9JNM IC's), they did overclocking the ram to DDR3-2100MHz+ (on the EP45T-UD3R's) with low volts like 1.86-1.92v.

my experience with the EP45T-UD3R, i used to try a few kits with Micron D9GTR and D9GTS IC's, they did not overclock very well at all on my board, even with high volts.
anyways, i'm sorry i could not be more help. as far as i can remember i did post my voltage settings, i'm not sure what can i do to help you more.