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Bad Power Supply?

G

gimp

[H]F Junkie
Joined
Jul 25, 2008
Messages
10,583
Built my new 9800X3D last week.
Gigabyte X870E AORUS Master
64GB RAM
Silverstone HELA 850

Let the machine run a few days, ran some prime95, etc. All working okay.

Pulled the Radeon RX7800 from my main machine today, installed in new machine.
Machine now randomly powers down. I hear clicking when it abruptly shuts down. Once or twice there were multiple clicks. After maybe 30 seconds, it automatically powers back up.
BIOS has the power on after AC failure disabled.

Sometimes the machine can run for an hour, other times it will shutdown after a minute several times in a row.

I ran Cinebench a few times. Had no issues completing the 10 minute GPU run. No issues completing the 10 minute multi-core run.
It decided to power off during the single core run.

CPU temps fine. Peaked at 81.1C
CPU core voltages fine, never even hit 1.28V.

A couple times it powered off while in the BIOS.

And actually now, machine won't even power on. Motherboard RGB lights up, but power button does nothing.
So need to jumper test I s'pose, but that will be for tomorrow.

Thinking a power supply issue since it's so random, but unsure.


EDIT:
seems I forgot part of the story. it was late last night when I wrote the OP.

The initial build and testing was just CPU, RAM, NVME installed in Antec Flux case.
CPU cooling is Peerless Assassin using a KryoSheet.

Now, powersupply did not come with "correct" ATX12v 4x4 cables; they were labeled EPS, but on the 4x4 end 1 of the 4-pin had incorrect plug. So I just used 1 4-pin on each ATX12v header on the motherboard.
Even after initial installation of all components, getting it powered on was inconsistent. Even the motherboard's onboard power button did nothing.
Occasionally it would power on, but after some amount of time it would do the abrupt power off.
Motherboard RGB lit up, onboard power button lit up, but power button did nothing.
DIagnostic LEDs were not lit up.

At one point, it ran long enough for me to upgrade BIOS, install Windows, patch Windows, install other software.
The following morning, it abruptly shutdown and wouldn't power back on.

Cannot find any shorts.

I ordered the proper ATX12v Silverstone cable and installed it. No change.
At that point, I pulled the motherboard from the case and bench tested. No change. Can't be a short to the case, then.
Still no GPU card.

did some searching and found that some users of older Gigabyte AMD boards (saw X570 and X670) had similar issues with no response to power button and pulling CMOS battery for a few seconds resolved it.
Well on this board pulling the battery is difficult as it's mostly covered by a heatsink.
So I used the clear CMOS pins. (I had previously used the clear CMOS button the back of the board)
Still on the bench, I powered on, powered off, and reboot a few times without issue. Then I reinstalled in the case, and still working without repeat of issue. This is possibly all coincidental.
Yesterday, I even powered down, powered on, and reboot the machine about 6 times with zero issues. I wanted to test that before installing the card.
That's when i moved the GPU over and issues returned.
 
Last edited:
Do you have the computer on a rug or carpet? Random power issues might suggest it could be static, a piece of metal causing a short, or PSU related.
 
The connections on the graphics card is good? PCIE and cables? Double check the case power and reset buttons, and also the front panel connectors to the motherboard?
 
El_Capitan said:
The connections on the graphics card is good? PCIE and cables? Double check the case power and reset buttons, and also the front panel connectors to the motherboard?
Click to expand...
Furious_Styles said:
Time to strip it down to the essentials. Re-seat all power. Mobo/CPU/mem/boot drive only, mouse/kb.
Click to expand...

Updated OP since I forgot part of the story.

I actually had the issues since the initial build, but they seemingly (probably coincidentally) cleared up for a bit and only returned after installing the card.

During initial build, I had same unresponsive power button which persisted when bench testing the system (all before GPU was installed)
 
gimp said:
Updated OP since I forgot part of the story.

I actually had the issues since the initial build, but they seemingly (probably coincidentally) cleared up for a bit and only returned after installing the card.

During initial build, I had same unresponsive power button which persisted when bench testing the system (all before GPU was installed)
Click to expand...
Once you're sure the PSU is fine then I'd have to suspect it's the mobo.
 
gimp said:
Updated OP since I forgot part of the story.

I actually had the issues since the initial build, but they seemingly (probably coincidentally) cleared up for a bit and only returned after installing the card.

During initial build, I had same unresponsive power button which persisted when bench testing the system (all before GPU was installed)
Click to expand...
Crap like that is why I i like to buy motherboards with physical power and cmos reset buttons on the front of the motherboard.
 
Furious_Styles said:
Once you're sure the PSU is fine then I'd have to suspect it's the mobo.
Click to expand...
seems it was the PSU.
Limited options to purchase stuff like that here... luckily Best Buy had a Corsair RM850x Shift. Reviews looked good.
Got it swapped on Wednesday; running without issue so far; about 40 hours. Just been letting it burn in.
Going to try and swap it back to where it will live as my primary.
 
stevenlee said:
After reading tons of PSU reviews, many power supplies seem to be quite poor. Somehow that really doesn't align with reality well to me as power supply failures are incredibly rare as long as you respect amperage limits on rails. I have seen some really cheap power supplies working for a really long time. They seemingly don't fail often and they certainly don't self combust. The only thing tat I have seen in real life was that one PSU had really short hold up time, but that's it. It was likely below ATX spec, so when power went out that computer also went out (I thought it was just normal, since PSU doesn't have a battery and is not expected to act as UPS, but my own computer didn't shut off in same conditions and I thought that it was my computer that was weird). That's as as close as I have been to PSU failure. So, I want to ask you all have you experienced PSU failures? Or at least some clear quality shortcomings? Please mention PSU model and what happened to it. I'm more interested to hear about cheap power supplies without sleeving, that are unpainted and don't have an 80 plus rating.
Click to expand...
Start a new thread for that. No one is going to see your question here.
 
stevenlee said:
After reading tons of PSU reviews, many power supplies seem to be quite poor. Somehow that really doesn't align with reality well to me as power supply failures are incredibly rare as long as you respect amperage limits on rails. I have seen some really cheap power supplies working for a really long time. They seemingly don't fail often and they certainly don't self combust. The only thing tat I have seen in real life was that one PSU had really short hold up time, but that's it. It was likely below ATX spec, so when power went out that computer also went out (I thought it was just normal, since PSU doesn't have a battery and is not expected to act as UPS, but my own computer didn't shut off in same conditions and I thought that it was my computer that was weird). That's as as close as I have been to PSU failure. So, I want to ask you all have you experienced PSU failures? Or at least some clear quality shortcomings? Please mention PSU model and what happened to it. I'm more interested to hear about cheap power supplies without sleeving, that are unpainted and don't have an 80 plus rating.
Click to expand...
Cheap power supplies can sometimes show signs of typical PSU failure, but not always. Also, 80+ rating has absolutely nothing to do with PSU quality. There have been 80+ Gold PSUs that are trash. Here are possible failure modes:

1. Cannot output rated wattage. This will result in the PSU shutting down, clear sign of PSU failure.
2. An extension of point 1- cannot output power under elevated temperatures, leading to shutdowns during long gaming/load sessions.
3. Cannot handle wattage spikes of modern GPUs. This will lead to random shutdowns during gaming.
4. Voltage does not remain within ATX spec. This will result in additional stress on the VRMs and shorten the lifespan of the hardware, especially when the hardware is under constant load.
5. Voltage ripple does not remain within ATX spec. Once again, this will stress the VRM and shorten the lifespan. Additionally, this can also lead to hardware instability, causing BSODs and other software crashes, which generally do not indicate a PSU failure.
 
El_Capitan said:
His testing of PSU's was simply the best, and I don't know what happened to him and his site, but he's sorely missed by me.
Click to expand...
The OG JonnyGuru was hired on by Corsair's PSU division. His fantastic replacement, OklahomaWolf, retired to new things and then the site went offline once leases expired.
 
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