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What happens when installing a memory module of greater size than your motherboards "max size for one module"?

  • My computer (a laptop) had only 256MB installed. I found out that the maximum total memory capacity for the motherboard was 1GB. I ordered a 1GB memory module (it's cheaper than two 512MB modules) with the intention of simply replacing the 256MB module with it. Before the 1GB memory module arrived, I learned that my motherboard's "maximum capacity for one memory module" was only 512MB (there are two slots). "Oh well, at least I can get 512MB out of the 1GB module and add that to the existing 256MB" I thought. BUT, after installing the 1GB module (accompanying the 256MB module), the BIOS, Windows and Linux all report "1.2GB" of working memory! I can even increase the frame buffer size in the BIOS! So, my question is: Is the total system memory as reported by BIOS and OS's actually indicative of the useable system memory? Are my BIOS and OS's simply counting the total installed RAM regardless of whether or not it can be used? Performance is definitely up, but do I have 768MB or 1.2GB?

  • Answer:

    you will have 1.2 gb.. your bios is probley a later version and you can flash most anyway to update them. if the bios is reporting it as 1.2 then thats what you will have... the way to check is to download a program free of the web called CPUZ this will give you a readout of your whole system and its performance. mail me if you need more help.

Spanglish McWhirter at Yahoo! Answers Visit the source

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your quite lucky that your laptop hasent failed to boot after adding more memory than your laptops baord can handle however like you said although you have 1.25gb of memory being reported,is that the amount that is actually being used i would tend to say no,but the one way to find out is by running the crucial online memory tool(http://www.crucial.com/),this will scan your system and report the total amount your laptop can "officially" handle crucial are very exact in their reports so you may be able to evaluate your memory specs from the info given in a case when i am not 100% sure about any system specs,i use a program called "si-soft s.a.n.d.r.a. lite"from http://www.sisoftware.net/index.html?dir=news&location=xi_sp2_release&langx=en&a= this will give you hardware information about all yours p.c,s components,including memory,and will include,memory timings,speed,latency,ect from there again you should be able to find out the "true" amount of memory running on your laptop like the previous answer reported,your bios may have been updated adn this could be why your maximum memory installable may have gone up finally if you are still not re-assured after using the above two programs/utilitys there is a program called"memtest" avalible from http://www.memtest.org/#downiso this is a program that will display FSB & Memory frequency, PAT status, memory timings, ECC status and the number of memory channels. also it will give you true reports of your installed memory i hope this has helped good luck mate!

brianthesnail123

on start-up it will beep and then go to sleep.

I would greatly reccomend a program called "siw"... it'll give you anything you will EVER need.

Trevor M

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