4gb ram installed 3gb usable

Been trying to fix this all night but cant do notting! could anyone help?


Aspire M1610
http://support.acer.com/acerpanam/desktop/0000/Acer/AspireM1610/AspireM1610sp2.shtml

Motherboard: acer 672m01-1.1-8ksh
CPU: Geforce 8800 GS
RAM: 4GB 800mzs
Processor: intel 2 duo core E4600
BIOS: Phoenix Award Standard Settings R01-B1
OS: Windows 7 Ultimate x64

Never had a problem before, but i upgraded my Ram from 2gb to 4gb and i was using 32bit..
tryed upgrading to win 64 bit,

tryed this,

Check the advanced boot options.
1. Go to Start, in the search bar type msconfig and press enter.
2. System Configuration window will open on the screen.
3. Click on tab named "boot".
4. Click on "Advanced Options" and uncheck the box for "Maximum Memory".

looking in my bios and theres notting for memory mapping, ticked the 14-15 memory hole thing

tryed swapping sticks around and reseated but notting works!

any help would be great
1 answer Last reply
More about installed usable
  1. it how the bios and mb uses some of the system ram and the pci bus. you always lose some ram. most mb vendors the program there bios to read the ram amount install and post it as a simple number. your desktop bios showing you the usable amount of 4g install which is right.
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