Windows recognize 3 GB instead of 4 GB in Satellite A100-451

Recently, I bought 2 memory modules (DDR2 SDRAM SODIMM 667 Mhz 2 GB each) and put them in my laptop
(Satellite A100-451 reference: PSAARE-04501SEN)

But Windows and laptop say Everest has only 3 GB of memory total.
Memory modules have been checked in HP Pavilion dv6820ea, then memory has been recognized as 4 GB.

Anyone know what is the problem and how to solve?

P.S. Site Toshiba says: maximum of expansion memory: 4 096 MB
[Satellite A100-451 part number: PSAARE-04501SEN | http://uk.computers.toshiba-europe.com/innovation/jsp/SUPPORTSECTION/discontinuedProductPage.do?service=UK&Model=125198 & series = 111510 & family = 2326 & x = 46 & y = 9 & Type = 2319 & ACTIO N = SHOW_ATTRIBUTES & BV_UseBVCookie = yes & PRODUCT_ID = 12 5198 #0]

Using the 32-bit Windows or 64-bit Windows OS?

Fact it that 32-bit Windows, no matter if it s Vista or XP, see only 3.2 GB of RAM due to the limitation of the 32 bit OS!

Tags: Toshiba

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