F2-6400CL5D-4GBPQ on EVGA 780i SLI Registering 2813GB

[skowronek]

• Motherboard: EVGA 132-CK-NF78-A1 LGA 775 NVIDIA nForce 780i SLI ATX Intel Motherboard
• Memory: G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ
• Processor: ?Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 Quad-Core Processor Model BX80562Q6600
• OS: Windows Vista Ultimate SP1

Motherboard posts and test the entire 4GB. However, when loaded, only 2813GB is registering. I realize 32bit limitations, however, I should at least be getting a solid 3GB and then-some.

I have yet to enable PAE, so I figured I'd make sure something isn't awry.

Also, I haven't run memory test yet, but I would imagine you're going to ask that of me.

Thanks.

[G.SKILL]

it depends on motherboards
different motherboards would get different capacity of available memory
you may need to ask your motherboard manufacturer for more details
thanks


G.S

[skowronek]

I believe I have found what may be going on. Per Microsoft on the topic:

http://support.microsoft.com/kb/929605/en-us

My current video card:

EVGA 01G-P3-N959-TR GeForce 9500 GT 1GB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card

Assuming my 32 bit system can only utilize (w/o PAE enabled) 3.12GB of memory, subtracting the amount used by the video card for MMIO would put me around 2.8GB.

Hopefully this helps someone else.

[G.SKILL]

yes
thanks for sharing this info


G.S