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Computer freezing randomly

Discussion in 'Hardware' started by Nuxly, Nov 12, 2011.

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  1. Nuxly

    Nuxly Thread Starter

    Mar 15, 2008
    Hello there

    It's been a while my computer's been randomly freezing, but I didn't really mind because it was happening very rarely. Now I have relocated (to a colder place, I'll get to the cooling issue later), and rebuilt my computer today, and it is now freezing very often.

    Sometimes it happens while I'm doing something, sometimes it happens while I'm logging on, the desktop doesn't have the time to show up, and sometimes it happens right when the Windows boot screen appears. I can trigger the crash by doing lots of stuff at the same time, like creating many particles in Powder Toy while having a video on the screen. I noticed it used to happen most of the time while I was watching videos, back when it was rare.

    What happens is that it stays stuck on the same image and doesn't respond to anything. I noticed the HDD led always goes off when it happens.

    So, first of all, my specs:

    Motherboard: Asus P5N-T Deluxe
    CPU: Intel Core 2 Quad Q9400 (2.66Ghz)
    RAM: 3x Kingston HyperX 1Gb, 1033Ghz (DDR2)
    GPU: Colorful GTX260
    OS: WinXP Pro SP3 (x86)
    PSU: Corsair TX650 (650W)

    Here's what I did so far:

    - I unplugged everything unnecessary (including USB devices and network cable). I left only one RAM, one hard drive, ...
    - I've tried with a different GPU (a GeForce 7600GT, for reference), had the same problem.
    - I've tried with each of my RAMs, on different slots, always had the same problem.
    - It might not be the hard drive, it's brand new and I already experienced this problem before I had it.
    - Not the software either, I tried fixing Windows using the CD but even the Windows installation makes it freeze.
    - I don't think there's something wrong with the freq/voltage, everything is on AUTO in the BIOS....
    - I tried flashing the BIOS. It failed. I had to use the recovery thingy, I'm not trying that again.
    - My PSU should be fine, it used to power much more devices than there are right now.
    - My drivers are up to date
    - I've checked the temperatures using speedfan, everything looks normal and nothing seems to go up before it freezes. I think my computer is well cooled, and I have that problem even when the case is open. Plus, as I mentioned, the room is cold.

    I think that's all.
    I'm still suspicious about the CPU since the crash seems to be triggered by a lot of activity on the screen that is not hardware-accelerated (I could run a 3D game without trouble, but I can trigger the crash with Powder Toy as said above). But the temperatures look ok so I don't know...
    Any idea?

    Thanks :)
  2. Nuxly

    Nuxly Thread Starter

    Mar 15, 2008
    I replaced all my SATA cables, plugged the hd on a different port, the problem is still here. I've checked the SMART data using a tool from Hirens bootcd, it says 100% health..

    Then I ran a full hard drive test using the manufacturer's program, no error was reported.

    I also did some tests using PC-Check:
    - Motherboard test
    - CPU test
    - Full stress test (hard drive, cd/dvd, cpu, memory)

    Nothing wrong reported.

    Then I tried to run the memory test, and it froze right after the first test, at this step: http://i40.tinypic.com/116i2qc.jpg

    I ran Memtest86+ with my three RAMs and it reported tons of error, but it works when only one is present. But the PCCheck test still crashes.

    So I'm even more confused now, because I've tried with every RAM I have, even with a different set, and I have the same problem with all of them...

    Any idea? I'd be most thankful
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