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Old 07-23-2008, 09:39 PM   #1
1veedo
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Computer freezes (ram gets mapped wrong, cold reboot fixes it)


I have an intel duel core e8400 3.0ghz processor, an asus motherboard (which I have despised sense I got it), and 4GB or DDR2-1066 RAM. Recently the computer has been stalling. When I run memtest86+ it finds all kinds of errors just on test 1, which is where it checks the ram mapping or whatever. Any kind of warm reboot and the status stays the same. Booting linux fails with a kernel error. If I turn the computer off though and flip the switch on my power supply, wait a few seconds, and turn it back on memtest86+ reports no errors and Linux boots fine. It will run for about a day usually before crashing again. After the crash memtest86+ reports the same errors on test 1 again and I have to do a cold boot to get it working.

I have overclocked this computer in the past but nothing that involved raising CPU / RAM voltages above their specified values. I actually run the RAM consistently bellow it's stock value. 2.0 instead of 2.2. Raising the voltage to 2.2 doesn't fix anything. I have not overclocked the RAM, either. Lowering timing values, underclocking etc do not fix the problem.

In fact the RAM from what I can tell is perfectly fine. I think the motherboard might be at fault here, or possible the CPU. This motherboard has been constantly causing me problems sense I bought it but I had it running stable for a while (I had to install a sound card and disable onboard sound).

It's weird though because it really does work fine. For some reason the ram just gets mapped wrong and things crash.
 
Old 07-23-2008, 11:03 PM   #2
GlennsPref
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How is your power supply?
check it here, http://extreme.outervision.com/psucalculatorlite.jsp

Also under volts may lead to errors, when under load.

Can you check your ram sticks in another PC?

Or check your Mobo with some other ram?

What happends if you remove half the ram and run memtest86+ (new version is out, btw)?

see how you go!

Last edited by GlennsPref; 07-23-2008 at 11:07 PM. Reason: psu calc.
 
Old 07-24-2008, 11:49 AM   #3
1veedo
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My power supply should be sufficient. It calculated 395W and I have a 650W power supply.

Btw thanks for the site I had problems with my last power supply. It was a 520W or something but it was defective.

I cant really test my mobo/ram. There aren't any other computers around with DDR2. My family buys the little emachines. We have one here with windows vista running on 800mb DDR1 (don't ask me how it's 800mb but I kid you not). I have ubuntu on it too, dual boot, and this is actually what everyone prefers. Not that it's surprising, especially on hardware that really shouldn't be running vista.



I'm probably going to be out for a week btw but I'll be back.
 
Old 07-25-2008, 09:29 AM   #4
GlennsPref
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Hi, I would check the ram sockets for dust or corrosion, sounds like it could be a part overheating, or when it is warms up under stress a part might be moving in it's socket, it could also be the mobo chipset getting too hot.

Gear that has been Over clocked can be really flaky, I used to oc, asus a7v and 4 variants of it a7v-e, a7v-133, a7v-m mobos, it was good fun although a bit expensive at times.

Nearly all the parts were stressed at some point and had to be replaced, except maybe sound.

Last edited by GlennsPref; 07-25-2008 at 09:34 AM.
 
Old 07-28-2008, 08:48 AM   #5
1veedo
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I overclocked my last computer over 4 years ago it still runs fine. AMD 2800+ 64bit. That system is very stable. I've noticed the new Intel processors aren't very stable. A lot of people talk about how overclockable they are (and in the same sentence bash AMD) but Intel processors only overclock that far because Intel runs them a lot slower for stability. They're flaky, sometimes even at their stock underclocked values. If I would have known that I would have got the AMD 3.0ghz black edition processor. It benchmarks just as well, is probably more stable, overclocks less, but is probably more stable / less troublesome when overclocked.

What do you think would need replaced? The mobo? My current motherboard really hasn't done very well, not even for the first couple months before I started overclocking. Is there any way to find out what would be at fault (besides having a second computer nearby)?

Btw there isn't any dust in the ram modules. I'm not sure how hot they get though it's possible it's overheating but it shouldn't, not at stock values values at least. I know the CPU and mobo aren't overheating, and RAM usually doesn't overheat. People talk about how ram coolers are usually scams because you don't need them.
 
Old 07-29-2008, 12:12 AM   #6
GlennsPref
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Hi, usually the power supply is the culprit.

The tiny voltage regulators get hot, and when stressed to breaking point, can not supply the current required for the system.

I'd check the supply with a tester("Power Supply Tester, about (Australian)$100") or another power supply that you know works, or a new one.

Regards, Glenn
 
Old 10-18-2008, 11:14 AM   #7
1veedo
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I ended up getting a new power supply but it wasn't the problem. It was actually my motherboard, my computer's running great now. I guess this is an ambiguous question it's kind of hard to track this problem down a lot of times.
 
  


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