Question about eMachines W3507 PC Desktop

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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?

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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.

Posted on Aug 19, 2010

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you can use 2 sticks of 1 gig apiece to get to 2 gigs of total memory, but you have to make sure that the ram sticks use "512Mbit " technology.

the 512Mbit technology refers to the arrangement of memory chips on the ram cards. a card which uses 64Mx8 (8 seperate memory chips of 64M apiece) would be appropriate.

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DDR2's only showing half installed RAM


IF THE SYSTEM SAYS YOU HAVE 1GB RAM THAN YOU HAVE 1 GIG OF RAM, EVEN THOU SOMEONE TOLD YOU YOU HAD 2-512MG=1GB.

HERE IS HOW I SEE WHAT YOU ARE SAYING YOU HAVE 2-DDR-2 1 GIG STICKS THAT MEAN IF 1 IS INSTALLED THAN YOU HAVE 1 GB AND IF YOU COULD GET 2 STICKS WORKING TOGETHER THAN YOU WOULD HAVE 2GB RAM.
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YOU MOTHERBOARD MAY NOT ALLOW THAT MUCH RAM, OR WHAT I MEAN THE BIOS MAKE UP THE AMOUNT OF RAM.

TO RULE OUT ANY BAD CHIP SETS OR GOOD RAM OR BAD RAM.

TAKE THE PEACE OF RAM THAT IS WORKING OUT AND REPLACE IT WITH THE OTHER PEACE AND SEE IF IT WILL RUN.
IF IT WORKS THAN LEAVE THAT ONE IN PLACE AND INSTALL THE SECOND PEACE IN THE SECOND SLOT.
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OR THE SLOT MAYBE DAMAGED.
OR
THE CHIP DESIGN LAYOUT MAYBE THE OPPOSITE SIDE, THIS MAY MEANS THE CHIPS MAY FACE EACH OTHER, OR FACE OUTWARD FROM EACH OTHER.

ROD

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Of course if you could find someone to swap sticks with that would be easier. Some motherboards are more picky than others about which sticks they work well with, name brand manufacturers are more picky than aftermarket in general.

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