Why can I only access 3gb of RAM with 8 installed on a 64-bit system?

Why can I only access 3gb of RAM with 8 installed on 64 bit system? My BIOS recognizes all 8 gb installed in the system. I thought by installing 64-bit Ubuntu would take advantage of the higher RAM installed.

I am running an Intel Core i3 540 Can I access this 8 gb somehow? Thanks in advance.

--memory description: System Memory physical id: 30 slot: System board or motherboard size: 8GiB *-bank:0 description: DIMM SDRAM Synchronous product: ModulePartNumber00 vendor: Manufacturer00 physical id: 0 serial: SerNum00 slot: DIMM0 size: 4GiB width: 64 bits *-bank:1 description: DIMM SDRAM Synchronous product: ModulePartNumber01 vendor: Manufacturer01 physical id: 1 serial: SerNum01 slot: DIMM1 size: 4GiB width: 64 bits

On the Ubuntu about page it shows 3.0 Gib instead of the 8 you see above.

17 Sorted by: Reset to default

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