Difference in installed memory and usable memory

[Daedlus]

I recently installed 4GB of memory into my system, and in the bios, it recognizes that there is 4096MB installed, however it says that only 3328MB is usable.

System Specs are:

AMD Athlon x2 64 4600

Asus M32R-MVP

2 Seagate 150GB SATA drives in Raid 0

4GB Kingston pc 4200 in dual channel

ATI x1600

SB Live

Pioneer DVR-111D

Enermax 420 watt Power Supply

Not that it matters, but I am running Windows Vista Business edition.

I have attached a screen shot from the BIOS.

Any Ideas why there is a 700MB gap?

*edit - I have the current Bios update and the motherboard supports up to 8GB

Edited April 30, 2007 by Daedlus

[jcarle]

Please search the forums next time.

This has been answered here, here, here and here.

[ripken204]

you need a 64bit Windows.

[jcarle]

you need a 64bit Windows.

That will not fix hardware issues. 64 bit Windows is not the miracle solution.