Guest M.I.5¾ Posted August 13, 2008 Posted August 13, 2008 Re: BioStar Motherboard eaten my RAM ???!! "Hari Hari Mau" <harimau.mau@gmail.com> wrote in message news:c9b44d15-81e3-4940-837e-8a91e6d92800@v26g2000prm.googlegroups.com... > Hello all ! > > Just recently I upgraded my PC to 4GB of DDR2 RAM --- 2 X 2GB DDR2 RAM > Modules. > > But when I plugged in the memory modules and powered up my PC, I got > an unpleasant surprise !! > > Somehow the 4GB of RAM only shows up as 3587072K of Memory !! That's a > whooping 600MB of memory ****missing**** !!! > > The motherboard for my PC is Biostar's P4M890-M7-SE and so far it > hasn't given me any problem. > > The motherboard has a built-in vga, which I use. I allocate 16MB of > RAM as "shared memory" for VGA, and the "AGP-Aperture" I give it 32MB, > all min figure. > > When I first built the PC, I used a 1GB DDR2 memory module. The mobo > showed me the correct mem figures, ie., 1GB (1024MB) MINUS the 16MB > (of shared memory) and a 1MB of "T-Seg memory". > > When I purchased a second 1GB DDR2 memory and plugged it in, again the > mobo didn't give me any problem. It correctly gave me the 2GB (2048MB) > MINUS the 17MB of shared and T-Seg memories. > > However, when I plugged in the recently purchased 2 X 2GB DDR2 mem > modules, the problem occurred !! > > Instead of giving me 4GB (4096MB) MINUS 17MB, all I got is 3587072K > (around 3.42GB) of memory, plus the 17 shared and "T-Seg" memories. > > What's going on??? > > What can I do to get back the 600MB of my RAM that is > ****MISSING**** ???? > This would be an FAQ, if we had FAQs. 32 bit versions of windows can only access a maximum of 4 Gb of memory space. Unfortunately much of the other hardware also requires memory addresses and these are allocated from the top of the 4Gb downwards. The addresses so used become unavailable for adressing the RAM thus a 32 bit windows with a fitted 4Gb of RAM will appear to have less than the full complement. Your 3.42 Gb is actually quite a high amount, some users have less than 3 Gb left. 64 bit windows will make all of your RAM addressable, but not all applications work under 64 bit - assuming your motherboard and processor support 64 bit..
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