Question about Dell Dimension 4700 PC Desktop

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RESETTING BIOs to recognize my RAM. I HAVE 512 BUT SYSTEM IS ONLY RECOGNIZING 256

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If you load bios defaults does this help . . . clean both the dims and sims and blow out the ram slots . . . what kind of ram are you using ( are they an origanal pair eg your not mixing two differant types of ram as this can cause this problem as they can run and differant speeds)

Posted on Sep 05, 2009

  • Paul Storey
    Paul Storey Sep 05, 2009

    try removing the battery for the cmos too (if its not soldered to the board)

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Your computer has the ability to load 4 gb of DDR2 PC2-5300 240 pin ram
There is no need to mess with the BIOS. What is happening is possibly you have a bad stick installed, or it is not seated all the way in the slot. Each of the slots on your system will take a (1) GB stick, www.crucial.com sell these for $18.00 each, it is some of the least expensice ram out there. Your computer would run 1000X better just installing 2 of these sticks. Also, with that computer, look at the slots that hold the memory. If they are two different colors than make sure if you only 2 sticks that these sticks of ram go on the same color slot. Example would be (2) black slots and (2) gray slots...If you only have (2) sticks put them in either the black or gray but don't split them up. Good luck, ParrotHead PC Repair

Posted on Sep 05, 2009

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You can reset the BIOS by removing the CMOS battery from the motherboard and reinsert again..By the way before that clean the RAM slots and check the frequencies on both the RAM ...they must be same ...

Posted on Sep 05, 2009

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2 Answers

I upgraded my RAM to 1 Gig but it's still showing only 256 meg. Why?


Hi this model sopport 2Gig Memory Ram.


RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM
Installed RAM 512 MB
Max Supported RAM 2 GB
Number of Memory Slots 2 x DIMMs
Supported RAM Speeds 400 MHz • 333 MHz
Installed Cache Memory 256 KB

Please check in to your Bios system maybe share memory Video or capacity is setting

Nov 03, 2010 | Dell Dimension B110 PC Desktop

1 Answer

I replaced a 250 RAM slot with a 1GB RAM slot. There is no difference in speed. Ran a Norton system check and it is still recognizing the 250 mb RAM instead of the 1GB RAM.


try resetting the computer, if that doesn't work it could be that your computer only recognizes 250mb or your BIOS needs to be configured.

Aug 10, 2010 | Electronics - Others

3 Answers

Change ram from 512 to 1 gig bios cannot read added ram


The original 2 sticks of 256 Mb of RAM gives you a total of 512
Mb of RAM. Two 512 Mb of RAM gives you a total of 1 Gb of RAM.
With two sticks of 512 Mb of RAM are you sure you got a total of 192 Mb of RAM, this is a lot less than the original RAM total of 512 Mb?
Should this be 1920 Mb of RAM?
If this 192 Mb is correct then the RAM modules are either not compatible with the laptop or if the RAM modules are not from the same manufacturer then they may not work together.

Most laptops have video cards that use part of the main RAM for video RAM, that is why the available RAM is less than the installed RAM modules. The amount of RAM the video card grabs depends upon the type of video card and in some cases the amount of video RAM can controlled in the BIOS setting.

Nov 07, 2009 | Sony VAIO PCG-K25 Notebook

1 Answer

Ram Upgrade Problem


There is nothing wrong and your install is OK.
The laptop has used some of the RAM as video RAM for the video card that is part of the motherboard.
You should have noticed that with a single 512Mb RAM you would not have the full 512Mb RAM available to you, the video has grabbed 128Mb of RAM.

Jan 01, 2009 | Acer Aspire 3610 Notebook

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Memory reading


please check RAM its 256 or 512. pick up RAM & change the memory slot.

Sep 17, 2008 | Compaq tc1000 Tablet PC

1 Answer

What are the ram limits on a compaq presario 5000a. I put 256 ram in the compaq and it only reads 128. Why?


You can install up to 3 sticks of 512 mb of memory. Did you add a 256 stick to the already-existing 128? You need to put DDR266/PC2100 memory. To troubleshoot, remove the 128 stick and put your 256 in and see if it is recognized. You will know right away from the bios screen. Memory needs to be the same type.

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1 Answer

Compaq Presario M2000 PC Notebook


The Bios on the laptop motherboard only will recognize a total of 1gig Ram. So the 256 stick would be removed and 2- 512 sticks installed.

May 22, 2008 | Compaq Presario M2000 Notebook

1 Answer

RAM Memory upgrade: 1gb modeles recognized as 512mb


You may have incompatible memory. double check your order and use only recomended name brand memory such as Kingston, you can look up the correct memory on their website, or on newegg.com

Apr 23, 2008 | Dell OptiPlex GX270 PC Desktop

1 Answer

Memory count problems


Take out the 512mb and leave in the 256mb and 128mb and see what happens. Switch the memory around to other slots. It may be the speed of the chips. They should all be the same.

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