Random PC Shutdowns

[Disturbedguy]

Hi all,

So about two weeks ago, I had a random PC shutdown / restarts, while I was just browsing the web. No warnings or anything, just went off and then restarted itself.

It booted up ok, and was fine until Thursday this week when it shut down, rebooted, got into windows and it shutdown again, but this time did not start up again.

The fans, case power light and lights on the motherboard span up for a second then stopped and it was stuck in this loop until I completely powered it off by turning the PSU off and leaving it for a minute or so then turning all of it back on, but after about 10 mins it did the same again.

When the machine initially shut down, I checked event viewer for any logs, the only thing I could find was sudden loss of power. Thinking it could be overheating I checked the system temps using Speedfan, CoreTemp and GPU-Z, all the temps appeared to be ok, all between 30 and 40 degrees but still decided to give it a clean out anyway.

Double checked all connections to make sure none were loose.

Thinking there might not have been enough clearance under the case for the PSU fan, I got two, 2 inch metal tubes to stand the case on - I put these in place yesterday and had no issues all night, from about 18:30 to 02:00 and during that time I had played a few hours of Overwatch and CS:GO.

When the system is on, everything appears to be fine.

The only time's I have had any shut downs / restarts is when just browsing the web.

The ONLY hardware change since the first shutdown was adding a second GPU after which the shutdowns have become more frequent.

At the moment I am leaning towards the PSU being the issue (its about 7 years old now) but was wondering if anyone has any other ideas that I've not considered, or if there is a way I can test if its the PSU or not?

Thanks in advance,

DG

[satrow]

Which OS, browser and version, what plugins (Flash, Java, etc.)?

Anything useful in reliability history (Control Panel > Action Center > Maintenance)?

If it's the rig in your profile dropdown, the Agility 3 looks like the most likely to fail... if it isn't, full hardware details, please?

[Disturbedguy]

Which OS, browser and version, what plugins (Flash, Java, etc.)?

Anything useful in reliability history (Control Panel > Action Center > Maintenance)?

If it's the rig in your profile dropdown, the Agility 3 looks like the most likely to fail... if it isn't, full hardware details, please?

Win 7 / Chrome / Safari - Flash is disabled - use HTML 5

Only difference in hardware is 970 instead of 260.

The way its failing though, doesn't feel like a disc, simply because after it shuts down, it struggles to start up as if something has overheated...ive not had any disc access issues or such

[peterb]

My thought turn towards PSU as you have increased the load with the second GPU. However, if it is likely that you disturbed the hard drive connections, it is worth checking the integrity of the connectors.

[Disturbedguy]

My thought turn towards PSU as you have increased the load with the second GPU. However, if it is likely that you disturbed the hard drive connections, it is worth checking the integrity of the connectors.

Good point.

Second GPU was removed earlier and double checked the connections again.

System has been on and fine since my previous post so fingers crossed it stays working..

[DanceswithUnix]

Is the PSU a multi rail one? No problem with that, but you need to make sure the load is spread across the available rails and you aren't pulling too much from a single rail.

[Disturbedguy]

Is the PSU a multi rail one? No problem with that, but you need to make sure the load is spread across the available rails and you aren't pulling too much from a single rail.

I have no idea. A quick google suggests not..

Its a Corsair HX1000 Modular PSU

Since taking the second GPU out, ive not had any random shut downs...ive also likely not reconnected the cables to the PSU in the same way..

[Disturbedguy]

So the second GPU and accompanying cables were removed Saturday evening and so far, I've not had any shut downs.

Not wanting to risk the PSU going pop completely and taking other components out, I'm going to start looking for a replacement PSU, that supports SLI and can accommodate two 970's (each requiring 2 x 6 pin connectors)

Does anyone have any recommendations?

[CAT-THE-FIFTH]

So the second GPU and accompanying cables were removed Saturday evening and so far, I've not had any shut downs.

Not wanting to risk the PSU going pop completely and taking other components out, I'm going to start looking for a replacement PSU, that supports SLI and can accommodate two 970's (each requiring 2 x 6 pin connectors)

Does anyone have any recommendations?

https://www.amazon.co.uk/EVGA-Supern...ords=evga+gold

The EVGA G2 series gets excellent reviews. In the US they even have a 10 year warranty - not sure how long it is in the UK though.