This is what Intel says about the matter: http://www.intel.com/support/motherboards/desktop/dg45id/sb/CS-029147.htm but I've personally had no problems whatsoever on my DG45ID using 2 x 2GB Corsair TwinX 4GB TWIN2X4096-6400C5 modules under Windows 7 (32 Bit). As long as your memory has spd, this should tell the board the required timings and absolutely zero configuration was required for mine.
I have two DG45ID board sys. and I've been using Gskil DDR2-800 For about two years , they work perfect, the SPD sets the right volts and timing, Running cool and stable. With a Q9550.
P/S I'am running 8 Gigs on the DG45ID.
I have 16GB of OCZ Gold (4 x OCZ2G8008GK)
Thought it would be great to have 16GB of DDR2 and bought this when memory prices dipped a couple of months back. Unfortunately there is minimal difference in performance between 8GB and 16GB as most programs I use won't use all the memory available.
Memory performs very well. I've always bought OCZ.
GO to CTRL / ALT / Delete . Look at the performance tab and see how much RAM are you using I'll Bet you aren't using more than 3 Gigs??
Was this in response to my post?
At the moment the PC is virtually idle so my usage is:
and yes I am running 64 bit lol. I removed 2 4gig sticks to beef up my server.