Satellite A660 - 11 M - upgraded memory to 8 GB only 3.93 GB usable

I just upgraded my A660 to 8 GB using 2 x recommended Toshiba Go 4 sticks of memory. (DDR3 4GB 1066 Mhz SODIMM)
Running Windows 7 64-Bit OS

DxDiag properties and computer all seem to recognize all 8 GB, but in Taskmanager it recognizes only 4026MB of memory physicam.

Running latest BIOS 1.80

Help... What is happening... what I did wrong/not done...?

DXDiag data as follows

------------------
Information System
------------------
Time of this report: 11/12/2010, 08:50:40
Computer name: WILL-TOSHIBA
Operating system: Windows 7 Enterprise 64-bit (6.1, Build 7600) (7600.win7_gdr.100618 - 1621)
Language: English (regional setting: English)
System manufacturer: TOSHIBA
System model: Satellite A660
BIOS: Phoenix SecureCore Version 1.80
Processor: Intel Core i7 CPU Q 720 @ 1.60 GHz (8 CPUs), ~1.6GHz
* Memory: 8192MB RAM *.
* Available OS memory: 4026MB RAM *.
* Page file: 1990MB used, 6060 MB available space *.
Windows Dir: C:\Windows
DirectX version: DirectX 11
DX setup parameters: not found
DPI setting: Using System DPI
System DPI setting: 96 DPI (100%)
DWM DPI Scaling: disabled
DxDiag Version: 6.01.7600.16385 64 bit Unicode

Hello

That means the POST (power on self-test) screen appears; 4 GB or 8 GB of RAM?
All memory is recognized in the BIOS?
If so, then the memory has been recognized correctly and Windows 7 64-bit should be able to use all 8 GB of RAM.

Tags: Toshiba

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