2x2GB Showing up as 3.3GB Usable

[nitz369]

So I purchased F2-6400CL5D-4GBPQ from Newegg recently. When installed in a pair it shows up in windows as 4GB (3.25 usable). When installed separately they show up as 2GB. Is this a bad pair? Of course I have Win7x64 installed. Also I have messed with Bios settings. When bios boots it says 3325M on POST. Again should I RMA threw Newegg? Does Gskill offer an Advanced Replacement program?

Also Board is Asus P5Q Pro

[Tradesman]

Do you have the latest BIOS? You may want to test each stick individually w/ Memtest....also what cpu?

[nitz369]

yes I have the latest BIOS. I will test each stick.

I think its strange that each stick separately reads the correct amount but when installed in pair it is wrong.

[Tradesman]

Am thinking the BIOS may be assigning some of the DRAM elewhere, i.e. for video, but that seams a bit much