I've got mostly new parts in my PC. They're less than 4 months old. The PC runs fine. It never overheats, I barely even reach 50C when running full load. I've got 2 80mm fans and a 80mm fan/heatsink (copper core) on a P4 2.66GHz running 533 FSB. It's an ASUS mobo so I've been using the ASUS Probe app to check temperatures.
Well it would freeze up occasionally. You can tell because not only would the screen stop, but the fans in the case would all drop to minimum idle speeds. For a while I tried to find a pattern. Sometimes it would freeze in AH, sometimes not. Sometimes after hours of use, sometimes after minutes. I could leave it on all day and have no problems, but then turn it on another day and it freezes up in 30 minutes.
I thought that, maybe, the probe software itself was causing these problems (it was a buggy software) so I stopped using it for a while. I just started using it lately to check some things, but more on that later.
Problem is, "infrequently" became "increasingly frequent".
So my comp hadn't been on long today, I start up AH2 and join a HTH room, and within 20 minutes I lock up. I swear and hold the power button for 10 seconds to reboot. I re-join same HTH room and less than 10 minutes in (barely in time to find a fight and JUST as we merge) I lock up again. So I swear up and down in a manner reminiscent of Ralphy's father in A Christmas Story, shut the damn thing off, check everything (and I mean EVERY-freakin'-thing!) and I don't know what the heck is wrong with it.
The ONLY thing I can think of is that it might be heat-related, but it can't be the CPU. GPU (Ge4 128MB) is a little warm, but I can keep my finger on it indefinitely without burning it. Sound Blaster card: no heat. I can literally touch the heat sink on my CPU seconds after opening up the case (easy-open case) and not burn myself. I can touch all the mobo heatsinks on my ASUS P5P800 and none have much/any heat. I took an 80mm fan I had that was set low blowing air in over my PCI slots and removed the P4 duct in the side of my comp, and put the 80mm inside the case between the duct and the door, so that it's additional air flow into the case.... But I don't know if that's the problem. I took the heatsink OFF the cpu, the default thermal paste is evenly spread on it. I can't afford Arctic Silver but it's on my list of things to get.
So I don't know what the heck gives. It's a simple PC. No hardware conflicts. No DX issues. 425W power supply (20 pin). ASUS P5P800 LGA775 mobo (24 pin -- checked the manual, it says it'll run fine on a 20-pin supply). Intel P4 2.66GHz 533FSB (stock, no overclocking) with copper cored heat sink. 1x 512MB stick of ram. GeForce 4400Ti 128MB 8xAGP. SB Audigy PCI with gameport plug. The mobo came with a rear slot with 2 USB ports and a gameport, plugged that in as well. Mobo came with Sound Blaster on-board but I disabled that so I could use my Audigy (too bad audigy doesn't support front panel headphones/mic..

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So like I said it sorta sounds like it might be a heat issue -- but there's no heat! So I started up my ASUS probe again after I put in my duct boosting fan. It already ran cool. Its in a basement, 10 degrees F cooler than the rest of the house. Anyways, going by what it said today the CPU was running 28C and the mobo 33C. Is it normal for a mobo to be hotter than the CPU?
I was talking with Gianlupo and we couldn't figure out what the problem was, so I thought I'd post here. What would be causing sporadic lockups? Oh, details: Windows installed/updated when parts were put in less than 3 months ago. System is behind a router/firewall, has Norton, is scanned with Norton and spybot and ad aware and is clean. I put zonealarm on again recently (took it off after I got the router/firewall -- wasn't sure how secure I was wanted to see what hits I got). Win XP SP2. If I left anything out let me know.