Fedora 10 x64 doesn't detect all RAM

[spmirowski]

Hi,

I am running a Dell 370 with 4 GB of RAM.  Vista 32 SP1 shows that 4 GB 
is installed in System Properties.  The change
from 3 GB to 4GB wasn't picked up in Fedora 10 x64.  It's a Intel 925X 
chipset if that helps out.  Does anyone know
why it might not register 4 GB on a 64 bit OS?

free mem

            total       used       free     shared    buffers     cached
Mem:       3092948    1524736    1568212          0      46608     701228
-/+ buffers/cache:     776900    2316048

Thanks,

Stephen