Troubleshooting Power Problem

600Tguy

600Tguy

600Tguy

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Joined
30 Jun 2015
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7
Hello all


ASUS TUF gaming B650-plus ATX
Ryzen 7 7700
DDR5 32gb (2x16) corsair veng CL30 6000
Phantom Spirit 120

Crucial T500 2TB

Corsair RM750x 135mm fan (2021 version?)

EVGA 1060 6gb SC

Montech air 903 max

Windows 11 home

All parts are brand new (purchased December 2024-Feb/March 2025) other than the GPU which I've carried over from a previous build. The GPU hasn't skipped a beat in all the years I've had it. The build has presented me with no issues in 5-6 months of general and gaming use. Witcher 3, Warhammer 2, Banished and Farming Sim 25. Temperatures are stable with the CPU and GPU around 55-60c in Witcher 3 for example during summer months on high but not maxed out settings.

Playing FS25 over a week ago and the whole computer just loses power. I immediately thought power cut to the property but nothing else was affected. I go to turn it back on using the front case button and nothing. I turn it off and on at the PSU rear button and then press the front case button and it works. Windows 11 log in screen appears and then loses power.

Second attempt I get 15mins before it loses power. At this point I do not have any time to spare for further investigation so I switch it off at the rear and leave everything until the next evening.

I flip the PSU switch to on and use the front panel button and it turns on. I log in and everything is perfect whilst I browse and youtube, then after an hour it loses power. I read around and the the sense I get is that something is tripping the power supply and that's why I'm having to off/on switch.

Opened up the computer and double checked all connections and looked for any signs of concern. Then I had the idea to remove the GPU and plugged everything back in, powered up and it works. For a week+ now I can do everything except gaming and I have had zero power losses or any other worrying issues.

I'm now in a situation of wondering if it is the GPU causing this issue or has something happened to the PSU and it cannot handle the power draw of the entire system when just running normally not gaming and by removing the GPU I just took some stress off. Approx power draw is just over 300w. Below are a few things I've tried out:

Placed the GPU in the old PC (Skylake i5 6600k + Z170 build) and allowed it to run for 30-60minutes and it did not cut power or present a problem (now that it is the weekend I plan to do this again and leave it running through the day for a good amount of time to see if the same problem appears)

Placed the GPU in the second PCIE slot on the new MOBO. It produced the same power cut off problem.

Used a different extension socket, this produced the same power cut off problem with the GPU in and the PC runs fine without the GPU in.

Used the other PSU 6 pin cable for the GPU. This produced the same problem.


I'm hoping this is something a member has experienced or is aware of.
 
Quartz said:
Have you checked that your CPU has not started overheating?
Click to expand...
CPU temps have not changed and are around 35-40 at idle/general use. I don't see any higher numbers or spikes that are giving me concern. Cooler is seated and fully functional too.
 
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From what you've said, I think the test I'd want to do next is try a different graphics card in your new PC and see what happens.
 
I have been having this exact problem with my RM750X also the 2021 version I think (without the 12v HPWR connector).

I had it replaced by Corsair and the refurb unit they sent (different serial number) does the same. I think there is a bad batch.

Run Furmark plus Prime95 and see if that kills it. Beware if you have an AIO it can cook the CPU as the pump loses power.
It may take up to 30 minutes or so. Make sure temps are ok and case fans flat out as Furmark is hard on the GPU.
 
Joe42 said:
I have been having this exact problem with my RM750X also the 2021 version I think (without the 12v HPWR connector).

I had it replaced by Corsair and the refurb unit they sent (different serial number) does the same. I think there is a bad batch.

Run Furmark plus Prime95 and see if that kills it. Beware if you have an AIO it can cook the CPU as the pump loses power.
It may take up to 30 minutes or so. Make sure temps are ok and case fans flat out as Furmark is hard on the GPU.
Click to expand...
In light of the system failing with the GPU in, prime95 is the one I should go for, right?
 
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Tetras said:
From what you've said, I think the test I'd want to do next is try a different graphics card in your new PC and see what happens.
Click to expand...
I've managed to connect with some one locally who has a 9060xt. Hopefully within the next few days I'll be able to test with that GPU.

Thank you to everyone for their input so far. Very grateful for it all.
 
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600Tguy said:
In light of the system failing with the GPU in, prime95 is the one I should go for, right?
Click to expand...
Prime95 is to load up the CPU, furmark for the GPU. Together they will give a higher system power draw than any normal usage. You just want to see if it is repeatable and caused by maxing out power draw.

Monitor temps with HWmonitor though and make sure there is plenty of case airflow. Best to heat soak the PSU by using the system for something fairly intensive for a bit that doesn't cut it out, or just run prime95 for 30 minutes first as CPU coolers are bigger and happier running at high loads. Then adding furmark should trip it after a few minutes.

Your system is quite low power and wouldn't be more than 400w under full load I would guess so this is particularly concerning.
 
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