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What's causing my system to crash?

Chang10is

Senior member
If anybody out there likes the challenge of trying to solve a tough problem, try a stab at this...

I'm running a Celeron 533 @ 850 with 384 MB RAM, 2 hard drives (a 7200 and a 5400), a CD-RW, and the usual other stuff (1 floppy, 2 fans, 8 meg video, etc. -- nothing special). For the past few weeks, the system has crashed occassionally. I get a blue screen saying that it's dumping physical memory (not the blue screen of death, as I am running WinXP), and it also says something like, "if this is the first time that I'm getting the message, then there's no reason to worry. If you've seen this message before, a new device that you've added may be causing your sytem to crash." It says some more, but I get about 2 seconds to read the message before the system reboots, so I'm not sure what it says exactly.

Does anybody know what's causing the computer to crash? Just before it started giving me these problems, I added more RAM, a PCI hd controller, and a new hard drive. I'm thinking that there are 3 possibilities:
1) not enough power (I'm running this system with a Sparkle 235W PSU)
2) some kind of hardware problem, like possibly a bad RAM stick
3) a driver problem. Windows says that all my devices are working fine, but after it crashes and reboots is *sometimes* says that I have a device (or driver, can't remember which now. doh!) problem.
4) CPU is unstable because of overclocking

Did I leave out any possibilities? It's hard to test out possible causes for this problem because it doesn't happen that often. I'm worried that if the power supply is being stressed too much though, if it eventually blows, it'll take the rest of my system with it. Is anybody familiar with the error message that I'm getting?

POSSIBLE CLUES...
1) My system crashed on me 3 times while I tried to d/l some pics from my digicam to my PC through a serial cable while I was multitasking. When I just let the computer sit while d/ling the pics, it was generally more stable. However, my computer has crashed while I have been doing just about anything now: running defrag, e-mail, etc.
2) I noticed that my old 32 MB RAM stick (4 years old) lost 8 MB about a month ago. I think this was right before my computer started crashing. I replaced that RAM stick about 2 weeks ago, but the computer is still crashing. I'm wondering about the possibility that the fact that the old stick lost 8 MB might indicate that there's too much heat... maybe? Or maybe it was just b/c it was old?


SIDE NOTE...
Most of the times it has crashed, it's just my PC that goes down (and reboots). But a few other times, the lights have flickered in the rooms on my floor of the house (not sure about other parts of the house, unfortunately). In most situations, I would have thought that it was because there wasn't a consistent line of power to my computer that caused it to reboot suddenly without any prior warning. But the thing is that this has happened 3 times in the last 2 weeks, and the power in my house has been extremely consistent up until the time my computer started having problems. I don't think I've noticed any flickering lights around my house more than once a year before this. Is it possible for PSU problems cause anything like this? I'm thinking that a sudden change in the amount of power to be drawn through the lines might cause inconsistent power flow for a second through my house.

A HUGE thanks in advance to everyone for their input!
 
First I'd add a new PSU and see what happens. Can you add any voltage to your CPU/memory with your BIOS? That may help too...as last resort drop back to stock speed and run that way for a while. If that does nothing change each stick of ram out and try 1 stick etc. Various combinations of memory may have issues that crop up after extensive use.
 
You may have some bad memory sticks. I'm in the process of testing my memory modules to see if they are corrupt or not. I downloaded this utility which test your memory modules and so far I've found at least one of them has some bad memory addresses. The stick has caused Warcraft 3 and Starcraft to crash to desktop for me. Sometimes, though not very often, I can be surfing the net, listening to music or watching a video and my comp will give the same error that you get and reboot quickly. I'm almost certain this is a memory problem because all my software is updated to the newest drivers.
 
Speedyturtle, good idea about the memory sticks. Does anybody know where I can find a utility to test them out? Also, I'm looking for a utility that will stress the CPU 100% so that I can test whether or not overclocking the Celeron is the problem. However, if memory is the problem, is it possible for the system to crash while running a CPU utility? I'm wondering if it would it be possible to falsely diagnosis the CPU as the problem when a bad memory stick is actually the culprit.

Cmdrdredd, I don't think I can add voltage to the CPU/memory, but I'll check to make sure.

I've never changed the PSU on a system before. Is it a pretty simple process? Like I just take out the old one, put in a new one, and replace all the connections? I'm hoping there's nothing complicated about connecting the PSU to the mobo, the power switch, or anything else.
 
I used to OC a 533a above 800 like you're doing. They get pretty sensitive above 850, requiring at least 1.75v and a good HSF (I used a FOP-32). Even then full load temps get into the 50s C, which could impact stability. You might want to check your temps to make sure you're not getting too hot. Power isn't a big deal, I used an Antec 250W and it was fine. But it sounds like (from your edit) that you might have an issue with your home wiring. If so, I would recommend a better UPS or surge protector. Power surges might be causing your BSOD's (they're still called Blue Screens, even in XP).
 
Would I get the blue screen that I described if the processor were overheating? It seems like if it was the processor, I probably wouldn't get a message at all, and the computer would just reboot without telling me anything. I was leaning towards speedyturtle's guess of a bad memory stick until I changed the bios settings so that it would do a real RAM check instead of the quick cursory one that it normally does. I'm not sure if this is 100% thorough, so I'm still looking for a utility to another check. Well, any other suggestions out there? I don't know how to tweak the voltage going to the CPU, but I'm waiting for a new PSU to arrive right now.
 
Originally posted by: Chang10is
any other suggestions, anyone?

Yes, in my world everything revolves around HEAT. I was having problems similar to yours and I thought my RAM was going bad.

To make a long story short I just took off the sides to my comp and put a fan blowing right into the case. Haven't had a crash yet since.

Needless to say i'm shopping for a new case with better cooling potential. It didn't help that we just bought a house and it got pretty hot the last while here. We were in a basement suite before and it was nice and cool all the time there.

Try that out for size and if it doesn't work then obviously heat isn't your problem. Good luck.
 
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