Computer works fine for a few days then crash

Gigabyte / Ep43-ud3l
December 19, 2009 at 08:07:18
Specs: Windows XP
I've built a pc, and it will work for 3-5 days, but then it will crash so much that I can't even get into windows. I ran memtest last night, and it ran through more than 7 passes and hadno failed bits. 12 hours later, my computer crashes. So I run memtest and get more errors than I can count. I've tried two different sets of RAM and two of the same motherboard. For both times that I had the motherboard, it would work 3-5 days and then start with horrible memtest results. And I put both sets of RAM at the proper voltages. Anyone have a clue what this might be?

MB: gigabyte EP43-UD3L
RAM: Crucial Ballistix

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December 19, 2009 at 09:03:02
Try removing and replacing each of your RAM sticks 4 or 5 times. Be sure the computer is unplugged when doing that and practice proper anti-static precautions.

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December 19, 2009 at 09:24:59
Not enough info. List your complete specs in as much detail as possible & include the power supply specs (not just wattage). Have you been monitoring your CPU temp?

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December 19, 2009 at 10:50:06
Are all the parts new?
I can think of a host of reasons.
CPU not seated or missing thermal paste.
Hard drive has errors.
Loose connector to hard drive or M.B.
Bad ribbon cable.

After a number of crashes the OS can become unstable as well.

At some point...tearing the system down...doing a bench test and starting over may resolve the problem.

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Related Solutions

December 19, 2009 at 10:58:34
I actually think we figured out the issue. The RAM seems to be overheating. So after it had been sitting for a couple hours and with an added fan for airflow, it's gone through 5 passes on memtest with no errors.


MB: Gigabyte EP43-UD3L
RAM: Crucial Ballistix BL12864AA1065.8FE5 (not overclocked)
CPU: Intel Cor 2 Quad Q9400 (Not overclocked)
PSU: Rosewill XTREME RX850-S-B 850W

Like I said, I think the ram just doesn't get rid of the heat quick enough.

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December 19, 2009 at 11:22:31
Then you either made a bad case choice or you don't have a rear case fan installed.

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December 19, 2009 at 12:17:22
There was a rear case fan along with a fan on top that are pushing air out. I added one in the front to pull air in.

The case was capable of housing an Intel Core i7 build (two of them, actually) with 6 Gb of ddr3 (I'm pretty sure the clock speeds were the same, if not higher than mine). I'm sorry, but that wouldn't sense to for either of those to be the issue.

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December 19, 2009 at 15:23:14
Ignore, I found the answer.

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December 19, 2009 at 16:16:50
"The RAM seems to be overheating"

It's very rare that RAM overheats. Are the modules hot to the touch?

"And I put both sets of RAM at the proper voltages"

And that would be 2.2v, right? If not, your problems may be due to undervolting, not overheating.

Same problem, same board, same RAM:

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December 19, 2009 at 16:27:31
Yes they are set to 2.2v. I understand that it's rare for RAM to overheat, and honestly it doesn't make sense why it would, but all the tests I've done are proving that. And it's actually a good explanation that it's rare because nobody that I've talked to have seen a computer work for 3 days, then crash, sit turned off for a few days, work for 3 days then crash. It makes sense that something is slowly increasing heat, and when it gets too hot, start crashing. And memtest is showing me that it has something to do with the RAM, unless memtest will get hundreds of thousands of errors because a different part isn't working.

And yes the sticks are pretty hot when I touch them. I also haven't touched them immediately after being used, so I'm sure they've cooled down quite a bit by the time I touch them.

But I increased air flow, and turned my fans on hi and it's running fine so far. And this was only after a couple hours of it sitting off, which before it would still get errors.

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December 19, 2009 at 16:30:22
What are system and CPU temps?

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December 19, 2009 at 16:37:11
System: 28 C
CPU: 26 C

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December 19, 2009 at 16:46:46
What is the shut down temperature set to in the BIOS (PC Health)?

Do your RAM modules have heat spreaders on them?

Try installing a live temperature program that runs in the tray. Your motherboard disk may have one or try speedfan. Monitor the temps under stress.

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December 19, 2009 at 17:04:26
The modules you are using are NOT on the QVL from Gigabyte.

IMO running DDR2 at 2.2 means you are going to create extra heat. DDR2 standards are for the RAM to run at 1.8V.

Crucial is just juicing the chips to get faster speeds out of them. Look at the link below. memory list on right.

I would try to exchange the RAM for something on the QVL list.

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December 19, 2009 at 18:47:33
"Crucial is just juicing the chips to get faster speeds out of them"

Unfortunately, this is all too common. The JEDEC standard sets the default voltage for ALL DDR2 SDRAM at 1.8v (1.7v minimum, 1.9v maximum), regardless of whether it's DDR2-533, DDR2-667, DDR2-800, DDR2-1066. The fact that many manufacturer's are spec'ing 2.0v, 2.1v or 2.2v to get their RAM to run at it's advertised speed tells me that the chips they're using aren't up to par.

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