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Dodgy hardware issue - can it be the PSU? - Page 3

post #21 of 27
Thread Starter 
So it finally gave out the other day. Wouldn't start for the life of it.

I opened it up, removed DVD, extra HDDs, front pannel fan, GPU. It started once but then had issues. When it did start, I noticed funny noises from the CPU cooler'fan. I bought a replacement and yesterday and also added a 5th HDD.

During the process I rewired all SATA cables and realized something was wrong with the case fans. While testing, with the three Antec TriCools online, it would cause problems. Never did with them offline.

So I decided to remove the TriCools from power. Easy to do, with a rewiring in progress. It was fine after that. It even ran with (mobo), CPU, 5x HDD, 1x ATI HD3750, 1x NVIDIA 7900GS (yes, windows complained!), 2x case fans (1x scythe + 1x noctua). All in all MORE power draw than before, as I had only one GPU and 4x HDD. Suffice to say that after these tests I'm pretty sure the PSU is still fine.

I'll have to get an oscilloscope if I want to test it out... frown.gif
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post #22 of 27
Glad you got it going. Strange that the fans would cause problems. I would think they would just stop working. But I'm no electrition. Happy holidays.
post #23 of 27
sounds like you need dust filters if you don;t already have them. Fan shorts. Wow. Life is stranger than fiction.
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post #24 of 27
Thread Starter 
I'm back with a bang. Actually, no bang. Just back.

It's random, apparently. I've reconnected the fans. And I've been running with 2 video cards (nvidia 7900gs + ati hd3870), 6 drives (put in an old 80gb drive), the 2 fans that apparently "caused" problems and an extra 92mm fan I had around.

And I do have dust filters, which I clean every week.

I've had issues once (barely got it starting - took me ~5min of start/no-go/cut power/wait/re-apply power/try again). After that day, I've yet to have the issue again (~10 starts so far).

This is clearly intermittent frown.gif
Edited by switch.dota - 11/29/13 at 4:38am
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post #25 of 27
does it go away if you unplug the new fans? If so the old fans may still be good, I'm wonderng if the rail you have the fans on is the bit that's dying.
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post #26 of 27
Maybe you need to get a higher capacity PSU.
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post #27 of 27
Thread Starter 
Quote:
Originally Posted by bombastinator View Post

does it go away if you unplug the new fans? If so the old fans may still be good, I'm wonderng if the rail you have the fans on is the bit that's dying.
Nope. The "problem" comes and goes as it pleases. Tinkering with the PC does seem to modify its state, but I think that's only apparent. The only pattern I've seen is randomness.

The fans (3x Antec Tri-Cool) appeared to cause the issue. But I've reconnected them back (and added two more!), added MORE consumers (1xGPU & 2xHDDs) than I had when the problem first manifested - yet at this point it works flawlessly.

So to sum it up:
- 1x GPU, 4xHDD, 5xFans = has issues sometimes (never had any for the past ~5 years until a few weeks ago)
- 1x GPU, 2xHDD, 2xFans = has issues sometimes (tested only ~10 times)
- 2x GPU, 6xHDD, 7xFans = had the issue once, never since (~20 starts so far)

I've checked the PSU voltages for 12V and 5V - stable and reliable, well within spec. Other odd voltages are a bit difficult for me to measure.


I turned my OC down to stock for now. I'm quite positive the OC has nothing to do with it (worst problems were right after I set the BIOS to stock; now with same settings I've yet to see the problem for ~1 week).

Quote:
Originally Posted by sepiashimmer View Post

Maybe you need to get a higher capacity PSU.
See the summary above.
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The Mark I
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Optical DriveCoolingOSMonitor
Asus DVD/DL-RW Scythe Ninja+ rev B w/ Scythe GlideStream 2kRPM Windows 7 x64 20' LCD 
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