help pls Dimm Issue on 2460

Discussion in 'Tyan' started by Jdh, Nov 9, 2003.

  1. Jdh

    Jdh Guest

    i have a S2460.
    i had Two 256mb Dimms in there (approved MA LABS) -
    they are doubled-sided ram.
    Ok, I added a 3rd Dimm - a 512mb Dimm also from MA LABS,
    I immediately started getting some weird malfunctions in Windows and even a
    blue screen or 2 with errors.

    I took out the 512mb Dimm and it is working pretty sweet again.

    first, please tell me - is there an order as to how these Dimms should be
    placed in the 2460? how should they be placed?
    any ideas?
    Have plenty of power and all.
    please help and thanks.
    Jdh, Nov 9, 2003
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  2. Jdh

    default Guest

    According the to datasheet for the northbridge, the largest banks need to be
    in the lowest numbered slots and then work down from there.

    With my S2466N, I was unable to get it to run reliably with 8 banks of ECC
    Registered RAM, but it would run fine with 6.

    Are your DIMMs, registered? If not then that is the problem as the
    northbridge cannot handle much fanout. If they are ECC, then try enabling
    it and set it to trigger SERR on all errors. Then you can see if you are
    getting parity errors detected.

    Then perhaps, try the 512 by itself. If it works good, then add the 256's
    one at a time. You might also try using DocMemory to pattern test your ram.
    default, Nov 9, 2003
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  3. Jdh

    Jdh Guest

    Thanks a million, default - i will try some of your suggestions out and get
    back here. Thanks, jdh
    Jdh, Nov 9, 2003
  4. Jdh

    Jdh Guest

    Lowest numbered slots are left to right?
    How do you trigger SERR ?
    I have gotten some errors with the 512mb Dimm in so far.
    Put it in the far left slot by itself, then the far right.
    I put one of the 256mb Dimms in the next slot to the right of the 512mb dimm
    and got blue screen errors.
    Not good.
    Why on earth do the two 256mb Dimms work so well, but the 512mb dimm doesnt?

    please help.
    what else can i do here?

    Jdh, Nov 12, 2003
  5. Jdh

    default Guest

    The lowest numbered slots are closest to the cpu on the 2466n. Probably on
    yours also. Check the manual or read the labeling on the mainboard.

    SERR is in the cmos setup. If enabled, you will be notified when ram errors
    occur. It will cause a non maskable interrupt.

    Is your 512mb stick, single or double sided or single or double banked?

    Remember the biggest banks should go in the lowest numbered slots according
    to AMD.

    Are your DIMMS ECC and Registered? This is very important and you have not
    said so far.

    Perhaps someone here with a 2460 could answer you better.
    default, Nov 14, 2003
  6. Jdh

    Jdh Guest

    they are registered Dimms from MA Labs
    I believe they are double-sided.

    I found out from another poster about these certain "combinations' that are
    recommended by Tyan for ram dimms. I cannot believe all these
    restrictions - it is amazing.

    Right now I am running fine once again on my 2 MA Labs 256mb Dimms. I
    still have my 512mb stick but it is not recommended by TYAN to put a 512
    stick in with two 256mb sticks. Unbelievable.

    thanks for any help, default.
    Jdh, Nov 18, 2003
  7. Jdh

    default Guest

    Wow, the 2460 is kind of finicky it would appear. Perhaps you should send
    an email to support @ They have usually been pretty good about
    answering for me. Maybe they can suggest something so you can get more of
    your ram installed.
    default, Nov 18, 2003
  8. Jdh

    Simon Guest

    The combinations are not 'recommended' they are the only ones acceptable.
    Go to tyans website @ and look for the downloadable version of
    the motherboard manual for the S2460. This will list all combinations
    possible. With two sticks of 256Mb RAM, they must go in slots one and
    three. As I mentioned to you before, the only other way you can use your
    512Mb stick, is in combination with another 512Mb stick and a 1Gb stick.
    OR, purchase two more 256Mb sticks for the other two slots for 1Gb total.
    The file you are looking for on their website is m_s2460_103.pdf it will
    give you a table on page 21 of the PDF file showing ALL combinations

    I don't know what else to say to you, according to their specifications, you
    cannot use 2 x 256Mb RAM with a 512Mb RAM stick. Their will also be no
    further BIOS updates for this motherboard, they have told me this.



    Do yourself a favour and look at the motherboard manual.
    Simon, Nov 18, 2003
  9. Jdh

    Simon Guest

    Simon, Nov 18, 2003
  10. Jdh

    Charles V Guest

    Just saw your posting. I have a pair of 256mb Dimms and a single 512mb Dimm
    installed and operating in my S2460, without incurring any memory problems
    whatsoever over the past 22 months.

    The pair of 256 Dimms were initially installed in slots 1 & 2 by Monarch at
    time of purchase in October 2001. I subsequently (Jan 2002) added the 512mb
    Dimm in slot #4. I don't remember why I elected to place the 512 chip in
    slot #4, but that's where it's been since making the memory upgrade.

    The chip information that I have in my record files is:
    1. Two each Corsair MEM DDR PC-2100 DDR 256 REG 2100 (installed in slots

    2. One each Corsair CM73SD512R-2100 512MB, PC-2100 DDR ECC Register Memory
    Certified for Tyan Thunder K7 S2462 (installed in slot 4)

    The only precaution that I observed when installing the 512 chip was to
    place a layer of several cardboard strips under the MB when installing the
    chip ---- to permit application of adequate downward pressure without
    bending or stressing the MB.

    I hope the above information may be of some help.

    Good luck,
    Charles V, Nov 18, 2003
  11. Jdh

    Charles V Guest

    I don't remember why I elected to place the 512 chip in
    Re-checking my manual, although it doesn't show an example of a single 512mb
    plus a pair of 256s, I've noted that it does show a pair of 512s plus a
    single 1024. In this example, it shows the pair of 512s in slots 1&2 and
    the single 1024 in slot #4. I now recall that I used this arrangement as a
    guide re what slots to install my combination of a pair of 256s and the
    single 512. This information is on page 21 of my User's Manual.
    Charles V, Nov 18, 2003
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