PSU Failing?

[theK1ll577]

Hey guys so currently I have a SeaSonic SS-750KM3 750W that is 5 years old. I recently upgrade my PC and after about 4 months it has started to restart without warning under any game load. No Blue screen just a restart. Reliability report only says improper shutdown and there is nothing on event viewer except the same.

 

What I've done so far:

 

MEMtest passed

Turned off CPU overclock, problem persists

Turned off GPU overclock, problem persists

Fresh Win 10 install / BIOS updated to newest, problem persists

Tried different GPU (old 980ti) in place of the new EVGA 1080ti SC2, problem persists

 

I'm pretty sure it's the PSU dying but I've read the same thing can happen if MB is dying as well. How can I further troubleshoot the issue without a spare PSU or Motherboard to rule out one or the other? Or has my current efforts been enough to warrant purchase of new PSU as the fix with a high degree of certainty. (Don't have enough funds to try new PSU and that not have been the problem.)

 

Full system specs:

 

MB: EVGA Z170 FTW Intel Socket LGA-1151 (140-SS-E177-KR)

PSU: SeaSonic SS-750KM3 750W (5 years old w/ 2 years on warranty left)

GPU: EVGA GeForce GTX 1080 Ti SC2 (1G-P4-6593-KR)

CPU: Intel Core i7 6700K usually OC to 4.7GHz

RAM: Mushkin Enhanced DDR4 32GB (2 x 16GB) Blackline @ 2400MHz // Mushkin Enhanced DDR4 8GB (2 x 4GB) Blackline @ 2400MHz

 

[ItsMitch]

Highly likely a PSU which is on the blink my dude, I'd rec looking into getting a new one. Especially if it's 5 year old.

[Jurrunio]

Go thing you still have the warranty

[STRMfrmXMN]

Replace PSU under warranty - problem solved if it is the PSU. If not, then you gotta try other hardware.

[theK1ll577]

Seems pretty uniform in recommendations so far lol.

 

I contacted for RMA, however in the meantime a friend recommended I use two separate PCI-E power cables for the video card instead of one cable with a 8 and 6 on the same cord and my system has been online and gaming for two hours now without restarting. Is this some sort of bandage fix or is it possible the issue was something else?

 

For reference the system has gone a day or two without restarting before so I'm not even sure if it's fixed. just the last two days I couldn't even launch a game without a restart and now it's two hours no problems.

[genexis_x]

Are there any parts overheating?

Mobo may be dying too

 

There are many reasons that can cause this issue. Anyway, try RMA the PSU.

[theK1ll577]

1 hour ago, ZM Fong said:

Are there any parts overheating?

Mobo may be dying too

 

There are many reasons that can cause this issue. Anyway, try RMA the PSU.

 

Nope, CPU and GPU are nice and cool. Usually the restart happens the moment I get into a game so no time for them to heat up at all. 40 to 50C on the CPU and 75C max on GPU was standard w/ overclocks.

 

Started RMA process, waiting on message from Seagate. Going to buy a multi-meter I think to self test PSU while I wait, further investigation of the 2 cables for GPU power seems to say it can mean less "ripple" and therefor could be staving off the restarts - even if the PSU is still dying in the meantime.