Random power issues

Lowe

Lowe

Lowe

Soldato
Joined
18 Oct 2002
Posts
6,224
Location
Newcastle Under Lyme
Hi all, I'm at the end of my tether here and so throwing it out to the wider OcUK community in case I'm missing something obvious or there's any ideas as to what might be causing me grief.

I have a relatively old machine, a 2014 build made up of an i5 4690K, Gigabyte Z97MX Gaming 5, 16GB Crucial Ballistix Tactical RAM, Palit GTX1080 Jetstream. There's a couple of SSD's and a spindle drive in there. For years it's ran at 4.1ghz without any alterations to voltages etc in the BIOS.

About a month ago it started to randomly shut down on the odd occasion. I put this down to the high ambient temps (was when we were having 30c and above weather) so didn't really think that much of it. But, over time it's started to happen more frequently, to the point now where it struggles to sit in Windows or even idling at the BIOS page without randomly shutting off within 5 minutes.

Initially I ripped out the RAM, tried each stick individually in each of the slots to see if that would make any difference, and it didn't. I then bought a new Seasonic 650w power supply which again made no difference. I removed all cards and reseated them, checked over the mobo for any obvious signs of bulged capacitors or heat marks to no avail. Temperatures on chipset, CPU and gfx card are all well within normal bounds.

I've tried turning off the onboard gfx, changing the PCIe slots manually to Gen3, enabling power loading in the BIOS but nothing's had any success.

So any ideas as to what else I can try?
 
Could be CPU degredation.

Have you tried running the CPU at a lower clock? I am not that familar with that CPU, but there is probably an option on the BIOS to change the multiplier, put it down and see what happens.

I am only suggesting this as my Sandybridge i7 used to be clocked at 4.8ghz... I think..... (this is years ago btw so memory) but I started getting BSOD's and crashes, turned out I was getting some CPU degredation, turning the clock down worked, apparently I could have tweaked voltages up, but I figured over a long period that might cause more degredation. I still use the CPU now, what 6-7 years later?

It could be some components (capacitor most likely) failing on your motherboard also.

Try the CPU clock first, if it still does it, it'll at least knock one more possiblilty off the list.
 
BUDFORCE said:
Could be CPU degredation.

Have you tried running the CPU at a lower clock? I am not that familar with that CPU, but there is probably an option on the BIOS to change the multiplier, put it down and see what happens.
Click to expand...

Due to the constant power cycling it ended up corrupting the BIOS values at one point so it ended up being put back to stock clocks (3.5GHz) when that was reset. I've left it at that for the time being until I could narrow down the issue.
 
Hmmmmm, I'm guessing failing motherboard then, it could be the CPU but I think less likely.

Try replacing the CMOS battery, build the PC outside of the case, see if it still happens.
 
I took the CMOS battery out, made no odds. :(

I'm thinking the same, mobo packing in. Not really seeing many Z97's about these days either :(
 
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