FreeBSD 7.0R and 7.0CURRENT (amd64) show only 2,5Gb RAM from 8Gb

[Nifty]

Hi!

I have two PC's based on iP965 and iG33 chipsets, 
both have iC2D Quad 2.4GHz CPU and both have 8Gb (4 x 2Gb) PC2-6400 RAM.
After installing FreeBSD 7.0R (amd64) and FreeBSD 7.0CURRENT (amd64) -
on iP965 dmesg show me 2,5Gb of RAM, on iG33 dmesg show 3,1Gb of RAM :(

Can anybody explain to me, does FreeBSD support m/b with 4 memory slot and
8Gb of RAM or not?

Thanks!