Question about ASUS A7V8X Motherboard

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Asus A7N8X-X (third memory slot)

The above motherboard has 3 memory slots and each can hold 1GB. There are currently 2 identical 1 GB sticks installed and working properly. When the third stick is installed, however, the new memory registers and tests normally in the post; then, "Windows will not start." This is puzzling because each stick is identical and works normally when installed in either of the first two slots (both independently and together). Any ideas? Here's my system specs:

Operating System System Model Windows Vista Ultimate Service Pack 1 (build 6001) ASUSTeK Computer INC. A7N8X-X REV 2.xx
Enclosure Type: Desktop Processor a Main Circuit Board b 1.73 gigahertz AMD Athlon XP
128 kilobyte primary memory cache
256 kilobyte secondary memory cache Board: ASUSTeK Computer INC. A7N8X-X REV 2.xx
Bus Clock: 133 megahertz
BIOS: Phoenix Technologies, LTD ASUS A7N8X-X ACPI BIOS Rev 1006 08/19/2003 Drives Memory Modules c,d 280.07 Gigabytes Usable Hard Drive Capacity
155.93 Gigabytes Hard Drive Free Space

MITSUMI DM-2000TE ATA Device [CD-ROM drive]
OPTORITE DVD RW DD1205 ATA Device [CD-ROM drive]
3.5" format removeable media [Floppy drive]

WDC WD16 00BB-55RDA0 USB Device [Hard drive] (160.04 GB) -- drive 2
WDC WD400BB-00DKA0 [Hard drive] (40.02 GB) -- drive 0, s/n WD-WMAHM1055188, rev 77.07W77, SMART Status: Healthy
WDC WD800JB-00JJA0 [Hard drive] (80.03 GB) -- drive 1, s/n WD-WMAM91942279, rev 05.01C05, SMART Status: Healthy 2048 Megabytes Installed Memory

Slot 'DDR1' has 1024 MB
Slot 'DDR2' has 1024 MB
Slot 'DDR3' is Empty   Local Drive Volumes  

c: (NTFS on drive 0) 40.01 GB 10.59 GB free f: (NTFS on drive 1) 80.02 GB 79.93 GB free g: (NTFS on drive 2) 160.04 GB 65.42 GB free

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  • 3 more comments 
  • silvertonedl Jul 20, 2008

    I commend you on the prompt response and apologize for any lack of clarity on my part in
    describing the problem. You are correct that any of the three sticks
    work in any combination in the first two slots but none works in the third. After
    the post (when Windows fails to start), I have seen a blue screen with codes
    that looks something like the following:

    I0x0000007E (0x0000005E, 0x89630C95, 0x87328568, 0x87328264)

    At other times, I was prompted to insert the Windows Vista disk, restart
    computer, and select the "Repair" option. After inserting the the disk, the process did not always progress to the "Repair" screen. At which times, the
    computer would simply post and restart again and again. During times when the screen did appear and enable me to select "Repair," the application just ran indefinitely with no indication
    as to the problem or whether it was being resolved.

    As for other memory, I have the two original 256 MB sticks that I had replaced with the 1GB ones. While I don't know how much this information helps, it
    describes the symptoms as I can best recollect them. Thanks


    Jeff Starks

  • silvertonedl Jul 21, 2008

    All of the memory sticks are in good working condition, and the only configurations that I have yet to try are those combining the 256 MB and 1 GB sticks, so I will try those. But as it stands, I suspect a bad memory slot. In which case, can it be corrected with replacing the mobo?

    Having upgraded the memory and GPU, I also would consider
    maximizing those capabilities by replacing the 2100 processor with a 3200 (a reasonably priced one, that is). But I'll be starting a new build any day now and have drawn the line at motherboard replacement. I just thought I'd try to extend te useful life of this computer since it still works well.

  • silvertonedl Jul 21, 2008

    Correction: I meant to ask whether it could be corrected "without" replacing the motherboard?

  • Peter VanderStoep
    Peter VanderStoep May 11, 2010

    Good job reporting what kind of system you have - Thanks.

    OK, you have 3 sticks, ALL the same, whenever 1 or 2 are installed, it reports good & works fine [above report from 2Gb installed]
    when the 3rd stick is installed, whichever one it is, Windows won't start. Did I get that right?? It isn't exactly what I saw in your question.
    Since you probably don't have 3 compatible other sticks [512 or 256M] [I'd like to see the result], My best guess is that there is something wrong with the socket. If my assumptions are not correct, with playing around you can tell what additional test to make. Let us know.

  • Anonymous Mar 21, 2014

    windows 7 64 bits is not working



6 Answers

I want to motherbord softwea

Posted on Sep 26, 2008


You don't mention what type of sticks (ddr333, etc.) The mobo only supports certain capacities depending what you are using. For example, ddr333 is only supported in up to 2 sockets. Maybe you already knew this, but I thought I'd throw it in. It's in the manual, you can download it from Asus.

Posted on Sep 25, 2008

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Interesting I just ran into the same exact problem. I have the same motherboard and 2 1-gig memory exactly the same. I bought 3rd gig to add and it is the same brand and specs of the first 2 gigs. - all from Crucial - Windows wont start all the way, also mouse looks like a big square block instead of usual arrow.
I don't have an answer but do have the exact same problem...hhhmm windows update issue..??

Posted on Sep 19, 2008

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The guest solution was mine. I would say that if the 3rd SIMM socket is bad, then the mobo 'mostly' works. If the 1Gb memory sticks are new, maybe you can return them, re-use in a new mobo isn't recommended due to speed. New ships can take advantage of faster memory & if the old memory chips do work, they will slow down the main chips.

Posted on Jul 21, 2008

  • Peter VanderStoep
    Peter VanderStoep Jul 21, 2008

    I don't think so, it depends on many things. I'd first talk to ASUS.

    Keep with the 2Gb for a while, DON'T replace the chip, plan on a new machine next year or so.


OK, you do have other memory, so to check for a bad slot, your 'legal' [available] numbers are:[expressed in Gb] 1/4, 1/2, 1, 1 1/4, 1 1/2, 2, 1/14, 3.

Other configs are possible, but not with the memory that you say that you have at hand. I suggest that you try 1 or 2 1Gb sticks with the 256Mb sticks. If as we suspect, there is something wrong with the 3rd simm socket, you should see problems whenever you use it.

NOTE: Most boards require the denser SIMM to be in the 'closer' spot.

Posted on Jul 20, 2008

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  • 84 Answers

Sounds like either a bad stick of memory or a bad dimm slot . Have you tried the memory on another motherboard ?

Posted on Jul 19, 2008

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What's your problem?bit ix38 quad gt motherboard with 2 gig of ddr2 ram i want to add a 1 gig stick of more ram that ive bought how do i do this? thanks windows seven

Top view of motherboard, scroll down. (Thought you might also like to read the reviews, and Comments)

Motherboard User Manual,

1) On the motherboard the Blue ram memory slot that is closest to the copper heatsink, is ram memory Slot 1.
Also known as DIMM 1.

Ram memory ALWAYS has to be in this ram memory slot.
The Processor reads ram memory Slot 1 first.

2) The Blue ram memory slots are Slot 1 (DIMM 1), and Slot 3.
(DIMM 3)
The Black ram memory slots are Slot 2 (DIMM 2), and Slot 4.
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To run Dual Channel ram memory, means there are two LIKE ram memory modules ('Stick'), and they are installed in the SAME channel.

This would mean to alike ram memory modules, in both Blue ram memory slots, or both Black ram memory slots.

Since the ram memory modules need to be alike, they are generally purchased from the same manufacturer, and are the same kind.

Running ram memory in a dual channel configuration, is supposed to increase ram memory 'speed', up to 30 percent.

This is Baloney!
May look good on paper, but in actual use in the field it's cr@p.
Actual performance increase is more like 1 to 2 percent.
This has been proven by Tom's Hardware, and many, many motherboards, ram memory, Processors, etc.

So you have 2GB of DDR2 Sdram, huh?
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If the above holds true install them in Slot 1 and Slot 3.

If not, and it is a 2GB stick of ram memory, be sure it is installed in Slot 1 (DIMM 1)
Install the 1GB stick in Slot 2.

It isn't the same as the 2GB stick.
It is 1GB.
Does NOT go in a dual channel configuration.

(Catching all this? There is NO dual channel ram memory!

It is ram memory that is -> ALIKE, and used in a -> dual channel configuration.
Used in two separate ram memory slots, that support the dual channel configuration.

Sold with the advertising scheme of 'Dual Channel', but really just means the two ram memory modules, (Or four), are -> alike.

1) Same Voltage used
2) Same Ram Timings
3) Same Chip Configuration
4) Same size in amount
5) Same frequency rate ('Speed')

With ram memory in a dual channel configuration, the ram memory modules team up on the task.)

For additional questions please post in a Comment.


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Info from the manual:

Memory configurations

You can install 128 MB, 256 MB, 512 MB, and 1GB DDR SDRAM DIMMs into the DIMM sockets using the memory configurations in this section.

• Install only identical (the same type and size) DDR DIMM pairs

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(3) - - Installed -

(4) - - - Installed

Dual-channel* (1) Installed - Installed -

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(3) Installed Installed Installed Installed

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