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Only 3.37GB of RAM on x64 when BIOS says 4GB
Can anyone help me understand why Windows reports "4.00 GB (3.37 GB usable)" under Installed Memory?
OS: Windows 7 Ultimate Build 7100 x64
Installed RAM: 4 GB (2 x 2GB)
When I installed Win7 originally (I started with the initial beta build), it reported 4.00 GB without specifying a lower 'usable' amount... I never bothered checking again and just happened to notice the change last night.
I've tried checking the interwebs for answers but everything I can find refers to having 32-bit... blah, blah. I understand all that, but I have 64-bit so I'm under the impression that I should be able to use all of it. I also don't think this is a limit on my motherboard... it specifies it's able to handle up to 8 GB.
Any help would be great. Thanks.
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