I have a Gigabyte GA-8AENXP-D Mobo. I just installed 2 more Kingston 1gb DDR2 modules for a total of 4 kingston 1gb DDR2 modules. When it boots it only sees 3145728k of ram. When I had just 2 1gb modules it showed 2091752bytes of ram. I know the new ram is good as I have replaced the old modules with the new ones and everything worked fine. I can even remove one of the modules and still get the bios reporting it only sees 3145728bytes of ram. I have the modules in the correct slots. I have the latest bios update from Gigabyte. And this Mobo is supposed to be able to handle 4 gigs of ram. Because of this, windows will only use the 3 gigs of ram! Anyone come across something like this before? Thanks.