Asus P4T533 memory and stability problems

Discussion in 'Asus' started by Bernie Lofaso, Apr 2, 2004.

  1. Almost 2 years ago (July 2002) I built a system based on the Asus
    P4T533. I used a single Samsung RIMM 4200 (256Mb) and the system ran
    great. This past December I ran across an application that was a
    memory pig and decided that I needed more RAM, so I bought a second
    identical RIMM and now I'm having stability problems. The problems are
    very intermittent, but when I stress the system with memtest86 or a
    memory intensive application like re-encoding video, then I get
    crashes. I've tried all combinations of RIMMs and it doesn't matter
    which stick of memory I use, nor does the slot(s) used matter.
    Everything is fine until I put both RIMMs in, then I get instability.
    Asus (like other MB manufacturers I've dealt with) don't seem to
    answer emails concerning problems with thier products ... at least
    after a week I haven't heard a peep from them. Is there anyone out
    there that can offer suggestions or if you've had similar experience
    .... how did you solve it. Incidentally, the system is running a 2.4Ghz
    P4 and it's NOT being over-clocked.

    Bernie Lofaso, Apr 2, 2004
    1. Advertisements

  2. Your problem may not be memory. I love this motherboard, and I have 6
    of them, but the early production of the P4T533 motherboard definitely
    had a problem (apparently in the onboard power supply for the CPU
    Vcore). The problem was fixed, and late production motherboards are
    solid (in fact, wonderful), but if you have one of the early ones, you
    may never get it to operate with stability.

    The dividing line between "early" and "late" was approximately October,
    2002. The "late" boards also have a small fan on the heatsink for the
    CHIPSET, which was missing on earlier models (note, however, that the
    fan itself isn't the issue, but was simply added at about the same time
    that the fix for the stability problem was made).

    People who have these problems often do report that "things were fine
    until I .... {did something that increased the "stress" on the board}".
    Most commonly, they upgraded to a faster CPU, but adding memory might
    do it also. It's also commonly reported that the problem is application
    dependent, that is it will run fine with applications that "lightly"
    load the CPU, but that increasing the CPU load causes instability.

    The only solution is to RMA the board to Asus, they will exchange it for
    a board that has the changes necessary to resolve the stability problems.

    Of course, it's also possible that the memory module that you added was
    bad. In any case, you should (MUST) be able to run Memtest with ZERO
    errors. If you remove the old memory module and test with only a single
    memory module (but the "new" one), what happens? For that matter, are
    you able to run memtest with zero errors using only the old memory module?

    Asus support phone numbers:


    Their RMA service is fairly good, I had to use it on a P4T533 recently.
    Total turnaround time was about 3 weeks, including shipping both ways.
    Barry Watzman, Apr 2, 2004
    1. Advertisements

  3. Bernie Lofaso

    Fred Blau Guest

    I have an early P4T533 (Rev 1.03, July 2002 = serial number 27...)
    that crashes with FSB at 133MHz, but seems okay with FSB slowed to
    125MHz. I called Asus tech support at 502-995-0883 in an attempt
    to verify that the problem is indeed the one you describe, but the
    technician knew absolutely nothing about this board, and he found
    nothing in his database about problems with it.

    Have you talked with oneone at Asus who is familiar with this
    problem? If so, can you point me to him/her? When you RMA these
    boards back to Asus, do you enclose a description of the problem
    and a request for a newer version of the board? Is there any way
    to get them to send out a replacement board _before_ I send them
    the bad one? Three weeks without my computer is a long time.

    Fred Blau, Apr 6, 2004
  4. Bernie Lofaso

    Golfe Guest

    I have an early revision of P4T533-C as well and have strange problems in 3D
    applications. (Games)
    Now and then the game just quit with no warning and I find myself back to
    desktop and no trace of the game..
    No error messages in event viewer either... Tried different videocards as I
    was shure that was the problem, but same strange behaviour with Abit 4200Ti
    as with my new Asus 9600XT...
    Asus smart doctor that came with my new graphic card reports low Vcore and
    low AGP Vddq.
    "VGA'S voltage is out of safe bound. Motherboard doesn't supply reliable
    Im using a P4 2.66Ghz and have 1GB Kingston 1066 RAM.
    This is driving me crazy.....
    Golfe, Apr 6, 2004
  5. Back when this board was in active, current production, this whole
    matter was discussed extensively, on this board. There were, over a
    period of 6 to 12 months, probably several thousand messages about it.
    I've told you what I know and have learned. You can accept it, or you
    can continue to live with an unstable system. I'd give you your money
    back, but I didn't charge for the advice to begin with.
    Barry Watzman, Apr 6, 2004
  6. The problem that was descirbed to Fred did NOT exist in the P4T533-C, it
    was limited to the P4T533 (no "-C" suffix).

    Your problem sounds like a bad power supply, although, of course, any
    given motherboard can have any given problem.

    Barry Watzman, Apr 6, 2004
  7. Bernie Lofaso

    Fred Blau Guest

    I hope my previous post didn't seem offensive. Asus seems very
    confused, and I was looking for someone within the company that
    could give me more information. I accept what you've written, so
    I am about to shut down (!) for two to three weeks while Asus
    deals with my board.
    Fred Blau, Apr 6, 2004
  8. I thought I'd post a quick follow-up. This board is a strange puppy.
    Barry ... I was fully intent on following your advice and RMAing the
    board back to Asus. To make a long story short, I decided to spend the
    weekend flogging the board to get the particulars about memory
    locations failing and when they fail. I got my computer room up to
    about 82 F which is warmer than it normally ever gets. After about 8
    hours of memtest and video compression tests, I didn't get a single
    error! One thing though ... I opened the case to get serial numbers,
    revision numbers, etc. that I thought Asus would ask for and noticed a
    bit of dust on one of the front case fans. Got out the compressed air
    can and blew it off and while I was at it dusted off the whole
    machine. It wasn't obviously dusty, but even parts that looked clean
    kicked up a little dust when sprayed. I also noticed that only one of
    my two front case fans had been plugged in. Guess I was worried about
    noise at the time, so I plugged it in. Now, I never had been worried
    much about heat build-up since 53C is about as hot as the CPU gets,
    which is reasonable. But I'm wondering if my little dusting and
    plugging in the 3rd case fan could have had any effect on things.
    Mostly just curiosity at this point. Even though I had a crash as
    recently as a week ago ... I just can't get the thing to fail right
    now. Just wondering what I did right? :)
    Bernie Lofaso, Apr 7, 2004
  9. It's possible that this is a thermal problem and that dusting the
    computer "fixed" it, but I'm skeptical. However, one thing I've
    wondered about was why Asus added a fan to the CHIPSET on the P4T533,
    but never did add a fan to the chipset on the P4T533-C (very similar
    board, same chipset !!). The fan was added at the time that the
    instability problems (reported, but never confirmed, to be in the Vcore
    power supply) were fixed. Some speculated that the fan was added as
    Asus way of telling the fixed from the unfixed motherboards (boards that
    have come back from the Asus RMA process have been seen to have had the
    fans added when their production dates were far prior to October, 2002).

    The P4T533-C never had any systemic problems, and not ALL of the early
    P4T533's had problems either.

    In other words, I can't answer your question with any certainty, but if
    it were my board I'd RMA it (problem description: Board is unstable and
    locks up / crashes, especially when warm).
    Barry Watzman, Apr 7, 2004
  10. Bernie Lofaso

    Ronald Cole Guest

    The northbridge fan on my P4T533 seized up after only six months. I
    replaced it and the new fan spins three times faster (according to
    ASUS Probe) and the machine hasn't crashed once since then! Sure,
    it's only anecdotal evidence, but one takes what one can get!!
    Ronald Cole, Apr 8, 2004
  11. Bernie Lofaso

    Hawkeye Guest

    What is the make/model of the replacement


    ASUS P4T533 / P4 2.8 @ 3.0 GHz
    ASUS Ti 4600 / 1 Gig 1066MHz
    RAMBUS / Audigy 2 / XP Home
    Hawkeye, Apr 9, 2004
  12. Bernie Lofaso

    Ronald Cole Guest

    Look for item "J" under the fans/filters/grills>small fans
    Ronald Cole, Apr 9, 2004
  13. Bernie Lofaso

    Hawkeye Guest



    ASUS P4T533 / P4 2.8 @ 3.0 GHz
    ASUS Ti 4600 / 1 Gig 1066MHz
    RAMBUS / Audigy 2 / XP Home
    Hawkeye, Apr 9, 2004
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.