The question asks if PC restarts when powered back on after being shut down during UPS operation.
The question asks if PC restarts when powered back on after being shut down during UPS operation.
Recently I got a new PC and UPS. UPS is a bit weaker, but I don't need it to work for long - just to give me a couple of seconds to save my work in Word and turn my PC off manually. And it works fine. Power outage > UPS starts beeping > I save my Word document, close it > Power: Shut Down PC.
However, this is where I noticed a problem.
When I turn off my PC, it automatically starts turning back on
. First time I thought maybe I accidently hit "Restart" instead of "Shut Down". But it happened again.
I googled the problem and found a solution to change option in BIOS, "Restore on AC Power Loss". But, when I went to BIOS, I noticed that
the option is indeed turned off
.
P.S. My PC never starts powering up again when there is electricity, i.e. when I turn it off for the night, even though it is always connected to the UPS.
CPU: [Insert CPU model]
CPU cooler: [Insert cooler details]
Motherboard: [Insert motherboard info]
Ram: [Insert RAM details]
SSD/HDD: [Insert storage specs]
GPU: [Insert GPU model]
PSU: [Insert power supply details]
Chassis: [Insert chassis name]
OS: [Insert operating system]
Monitor: [Insert monitor details]
Can you relocate to another wall outlet?
Not sure about the steps being followed.
When power is lost, are you using the standard Windows Shut down or sign out option?
This usually appears by right-clicking the Windows icon in the lower left corner?
You don’t need to or shouldn’t physically switch any power switches.
Check the power plan settings instead.
You can access this through the Command Prompt as an administrator and using the "powercfg /l" command.
By the way (from my system):
C:\Windows\System32>powercfg /l
Existing Power Schemes (* Active)
It's quite odd how the PC determines which device is connected to its power outlet. There might be a minor glitch when switching from city power to UPS power just before shutdown. My main concern is whether the UPS behaves differently when the PC switches between using power and not using it during shutdown. You've already verified the boot settings related to power restoration, so if the UPS briefly cuts power and then restores it, the computer should disregard it. Are you expecting any issues or does it function normally without the UPS?
Hi, thank you all for your responses!
UPS: Energenie EG-UPS-B850, power rating 510W
CPU: 13th Gen Intel Core i7-13700K at 3.40 GHz
CPU cooler: – (not specified)
I’m not sure how to check that.
? Cooler Master MasterLiquid ML360R?
Motherboard: B760 AORUS ELITE AX (U3E1)
Ram: Kingston DDR5 32GB
Storage: SSD Kingston 2TB + 2TB Seagate hard disk
GPU: NVIDIA GeForce RTX 4070 Ti 12GB
PSU: Seasonic g12 GM 850
Chassis: Cooler Master HAF 500
OS: Windows 10 Pro 64-bit
Monitor 1: AORUS FI27Q-P
Monitor 2: ASUS VA27EHE
Before you say my UPS is weaker than it should be – I know. I mainly use it for writing my thesis in Word, and I checked the current draw with an ampere clamp meter, which was around 300-400W. I spoke to a computer store seller who suggested this UPS.
But that’s not important. The UPS is working fine. After a power outage, I get about 30+ seconds of electricity, which is more than enough to save my work and shut down my PC and UPS.
I manually turned off my PC. Here’s the command I ran:
C:\Windows\system32>powercfg /l
Existing Power Schemes (* Active)
I just tried it. After unplugging the UPS from the wall outlet immediately after my last message, it began beeping. I closed Chrome and powered off my PC. As soon as it stopped making any noise from the fans and the monitor went dark, it started turning back on again, almost like a restart.
But when I turned it off while there was electricity available but without using the UPS's power, it shut down normally and stayed off. It's as if when it's connected to the UPS, "Shut Down" turns into "Restart".
This UPS model?
https://gembird.com/Repository/8707/EG-U...b12740.pdf
Are you connecting any power strips?
Additionally:
https://forum-en.msi.com/index.php?...ac...ly.372552/
This BIOS version:
https://download.gigabyte.com/FileL...bi...dd6a6f34ed
(Check that the manual matches what you need.)
In any case, review the "AC Back" settings on page 18 marked with numbers.
From the guide:
AC BACK sets the system condition after power restoration from an AC failure.
Memory The device resumes its last known active state when AC power returns.
Always On The unit activates immediately upon AC power coming back.
Always Off The unit remains off when AC power is restored.
= = = =
Also.
You mentioned you had roughly 30 seconds to shut down smoothly during a loss. Is that because the UPS can only supply battery power for a brief moment...? Compared to at least a few minutes?
Yes, that's the one.
Actually yes, but the power strip is
plugged into the UPS
. The reason for this is that UPS only has 2 outlets (one for PC and other one for monitor). However, I do most of my work on my second monitor. I am afraid that if the power goes out and my other monitor shuts down, I won't be able to save progress, i.e. move all the open Windows to the primary monitor.
90% sure that it is. It looks like it, but I would need to restart my PC to be sure.
Yes. I thought that it is on, so I went to BIOS to turn it off. However, when I opened BIOS, it was on "
Always Off
".
As I sad in the original post:
Let me check it, and I'll get back to you.
Your BIOS settings include the option to set AC BACK to "Always Off" by default.
When you switch AC BACK, are you certain to save and/or confirm before exiting? And do you have any dependencies concerning that "Soft-Off by PWR-BTTN? What does configuration setting do?" Equal signs indicate a question mark. As long as you're saving your work, the choice of monitor shouldn't matter. Also, if power fails during a task like Copy Paste, there should be no need to move open windows between monitors. Still, I understand the challenges when switching screens mid-action. Review the UPS manual for any issues with a power strip connection. A loop forming—Device A → Device B → Device C → Device D → back to Device A—can create electrical, video, audio, or network problems. Are you using any UPS management software and accessing specs via USB? Also, I’m not familiar with these settings, but could you confirm if the VCCAS voltage is correct and within the expected range for your setup? The 0.818 value seems unusual to me. Please advise whether the value fits the standard VCCSA specifications.