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Is insufficient cooling to blame?

post #1 of 10
Thread Starter 
My BOINC rig (Cap'n Crunch; see sig) will crunch for a couple of days, then stop outputting video. From what I remember, the CPU heatsink cools off, and I can't remotely connect to the BOINC client after this happens. I just took measurements, and the VRMs are close to 60°C, with the northbridge and southbridge heatsinks not far behind while under load (before video output has stopped). The computer isn't in a case, so there is little to no airflow over anything but the CPU cooler. Could my problem be related to something overheating? I'll post again with more details next time I reproduce the problem.
Edited by Iislsdum - 4/29/12 at 6:20pm
post #2 of 10
Quote:
Originally Posted by Iislsdum View Post

My BOINC rig (Cap'n Crunch; see sig) will crunch for a couple of days, then stop outputting video. From what I remember, the CPU heatsink cools off, and I can't remotely connect to the BOINC client after this happens. I just took measurements, and the VRMs are close to 60°C, with the northbridge and southbridge heatsinks not far behind while under load (before video output has stopped). The computer isn't in a case, so there is little to no airflow over anything but the CPU cooler. Could my problem be related to something overheating? I'll post again with more details next time I reproduce the problem.

Get a table fan, place nearby, blowing across the components. Also, the ambient temps contribute to stuff overheating, especially in an open air environment.

11153540.jpg
post #3 of 10
Quote:
Originally Posted by Iislsdum View Post

The computer isn't in a case

dust?
post #4 of 10
Thread Starter 
There is no dust that I can see, and the ambient temps are slightly above 20°C (68°F). I have a spare 120 mm fan I can place to blow on something. Any suggestions as to where to point it? Seeing as how I'm not entirely sure that overheating is the problem, does anyone have any other suggestions on what the problem could be?
post #5 of 10
Thread Starter 
I have reproduced the problem, and here's what happened:
  1. My BOINC manager (main rig) said that it couldn't connect me to the remote client (BOINC rig)
  2. CPU, northbridge, and southbridge heatsinks cooled off, as well as the VRM's. (VRM's now at about 40°C, northbridge and southbridge heatsinks closer to 50)
  3. I plugged in the VGA output to my monitor and plugged my mouse in via USB. I wiggled the mouse in order to turn the monitor on.
  4. The login screen appeared, as it should, so I plugged in my keyboard in order to log in and see what was up
  5. The screen turned a pale blue, and I couldn't get it to respond
  6. I pressed the reset button, and the computer rebooted
  7. The remote BOINC client is functioning normally, and I can now connect again
  8. Everything got nice and toasty, so I assume the system is under load, as it should be.

I have plugged in my spare 120mm fan, and it is currently blowing over the northbridge heatsink. I'll see if this helps the northbridge to stay cool, and if the problem persists.
post #6 of 10
what brand and model is your PSU?
post #7 of 10
Thread Starter 
I'm not entirely sure, but I think it's an Okia 450W. I know for sure it's generic, though. The machine's built out of spare parts, and my dad doesn't beleive in brand-name power supplies thumbsdownsmileyanim.gif
post #8 of 10
Thread Starter 
So, the 120mm fan seems to be doing a good job of keeping the northbridge cool, but BOINC still cut out on me last night. I plugged in mouse, keyboard, and monitor, but couldn't figure anything out due to my screen looking like this:
450

I checked the connection on the VGA cable at both ends, to no avail.

I'll try pointing the fan at the VRM's, and see if that helps anything. More advice is always welcome!
post #9 of 10
how old is the PSU? maybe the caps are dried out? it sounds like a power issue since the more stuff you plug in, (more power it draws) the more problems show up? have you tried switching out the PSU?
post #10 of 10
Thread Starter 
Don't have a spare PSU on hand to test with. I'm not sure, but my estimate would put the PSU at 3-4 years old.

Update: Looks like pointing the fan at the VRM's doesn't help either. It keeps them cooler, but still relatively warm, and the problem persists. I'm going to assume that the PSU is the problem until I have a chance to troubleshoot it.
Edited by Iislsdum - 5/3/12 at 4:16pm
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