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Trying to ugrade the ram from 512Mb to 1G. Once

Trying to ugrade the ram from 512Mb to 1G. Once installed, the system only recognized 512Mb. Any tricks to recognize the remaining memory?

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Mem needs to be installed in pairs, ie two 512 chips

Posted on Sep 07, 2009

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I bought a new 1GB ram(DD2) when i insert it it nt work bt whenever i insert it with old 512MB ram then its work bt in bios setting only show the 1GB ram


Maybe 1GB is the maximum amount of memory that your system will hold. And maybe your system likes memory to be in pairs, so when you put the 1GB in by itself it didn't work, but when you put it in with a 512MB it works.

May 18, 2012 | Computers & Internet

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Running a 1 gig stick and a 512mb stick, system only shows 896mb, apparently not recognizing all of the ram installed?


I assume that you've booted the computer with _ONLY_ the 512MB stick installed, and that the computer recognized it (reporting either 512MB or 384MB), i.e., the 512MB RAM is not "defective".

Hmm. 1024 minus 896 is 128.
So, the "integrated-into-the-motherboard" video-card is "stealing" 128MB of your RAM, to be used strictly for "video" purposes, leaving 896MB for Windows to use.

Now, about the "missing" 512MB of RAM.

1. If you have four slots for RAM, and they are physically arranged into two pairs of two slots, rather than four equally-spaced slots, your motherboard is capable of "dual-channel" mode. But, since your two sticks of RAM are not "matched" (size, speed), you _MUST_ insert both sticks into _ADJACENT_ slots (not slots 1/3, nor slots 2/4), in order to run your RAM in "single-channel" mode.

2. If you have two slots for RAM, interchange the two sticks, to see if that makes a difference.

Aug 19, 2010 | eMachines W3507 PC Desktop

1 Answer

Added 1Gb RAM DDR2 533 PC2 4300 CL5 but recognizes only 512Mb


the is a BIOS problem. you can still google search the BIOS updater. OR have a look on windows how much it is being detected.

Jan 27, 2010 | Foxconn P4M800P7MA-RS2 Motherboard

2 Answers

Dell Dimension 4600 desktop memory upgrade


well first the mother board needs to be capable of handleing that much memory you can check that by going to the dell website and checking the specs on that model pc or mother board if the bios isn't recognizing it the chances are it won't but take out the 512 stick and just try one of the 1Gig if it does recognize that then try the second stick if it doesn't recognize them both then chances are it can't handle that much memory.

Oct 07, 2009 | Dell Dimension 4600 PC Desktop

1 Answer

EMachine T6534 Ram Issue


did you try putting 4 1g stick . instead 2 1g and 2 512?

Jan 16, 2009 | Computers & Internet

1 Answer

Installed new RAM, PC would not boot up.


Will the PC boot? It may just be loose. Try it again. The PC may not boot if it does'nt recognize the memory.

Sep 19, 2008 | EliteGroup P4M800PRO-M2 (V2.0) Motherboard

1 Answer

Upgrade memory in a Xerox 7400.


Unfortunatly you have to have the memory stick from Xerox.

Aug 07, 2008 | Xerox Phaser 7400DN Laser Printer

3 Answers

IBM ThinkPad T40 2GB Max RAM


The T40 has two ram slots, you can put a 1g chip in each totaling 2g. If the chip will remove, then it is changeable. Vista needs a minimum of 256 to run, so, when you change BOTH chips to equal 2g it will probably read 1.744g, or it may read the full 2g. If it only reads 1g, then the second slot under keyboard may have malfunctioned. It could also be that the 256 chip is bad and your really only running 512 now. With all that said, in order to achieve 2g, you will need to put a 1g chip in each slot.

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5 Answers

Memory issues acer t180 ud360a, no boot up with all (4) ram slots filled...


i had same problem with mine, i have the acer aspire ast180-ud360a, dont put the same memory next to each other, u have to stagger it, so it looks like

------------> [1gb] [512mb] [1gb] [512mb] <--- correct setup

and not like

------------> [1gb][1gb][512mb][512mb] <--- incorrect setup

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