F5F Stay Refreshed Hardware Desktop Question about a random intermittent boot loop, potentially related to the power supply unit.

Question about a random intermittent boot loop, potentially related to the power supply unit.

Question about a random intermittent boot loop, potentially related to the power supply unit.

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BySonik
Junior Member
10
07-16-2021, 12:03 AM
#1
Hello All,
I’m writing to share a recent problem I’ve been facing with my Corsair RM750 (2021 version) PSU. I’d appreciate your advice on what might be causing this issue. Here’s a summary of what happened:
About half a month ago, my PC would randomly restart. There was no obvious power cut (the room lights stayed on), but roughly 5 to 10 minutes later it would shut down again and fail to come back on. Instead, it would repeatedly turn on and off—lighting up briefly before turning off, and the cycle continuing. Each time, I also noticed a clicking sound coming from the PSU, which got louder with each attempt.
I tried disconnecting the power cord for about five minutes, but the problem continued. Later, I moved the tower out of its case, opened the glass side panel, and tried to restart it. It worked almost instantly afterward—though that seemed a bit coincidental.
Yesterday, the same thing occurred again. This time, I unplugged the PC and turned off the PSU, waiting at least 15 minutes (assuming it was a surge protection feature). Still, it wouldn’t start. After removing the tower from its case once more, it powered back on as if nothing had changed.
I’m trying to determine if this is related to intermittent power cuts, dust accumulation, or inadequate airflow. There was some dust under the tower near the PSU’s exhaust area.
I hope your insights can help me resolve this and avoid it in the future. Any guidance would be greatly appreciated.
Thank you!
B
BySonik
07-16-2021, 12:03 AM #1

Hello All,
I’m writing to share a recent problem I’ve been facing with my Corsair RM750 (2021 version) PSU. I’d appreciate your advice on what might be causing this issue. Here’s a summary of what happened:
About half a month ago, my PC would randomly restart. There was no obvious power cut (the room lights stayed on), but roughly 5 to 10 minutes later it would shut down again and fail to come back on. Instead, it would repeatedly turn on and off—lighting up briefly before turning off, and the cycle continuing. Each time, I also noticed a clicking sound coming from the PSU, which got louder with each attempt.
I tried disconnecting the power cord for about five minutes, but the problem continued. Later, I moved the tower out of its case, opened the glass side panel, and tried to restart it. It worked almost instantly afterward—though that seemed a bit coincidental.
Yesterday, the same thing occurred again. This time, I unplugged the PC and turned off the PSU, waiting at least 15 minutes (assuming it was a surge protection feature). Still, it wouldn’t start. After removing the tower from its case once more, it powered back on as if nothing had changed.
I’m trying to determine if this is related to intermittent power cuts, dust accumulation, or inadequate airflow. There was some dust under the tower near the PSU’s exhaust area.
I hope your insights can help me resolve this and avoid it in the future. Any guidance would be greatly appreciated.
Thank you!

L
LightCloud
Member
145
07-16-2021, 07:11 PM
#2
Welcome to the forums, newcomer!
my PC
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.
my PSU Corsair RM750 (2021 version)
If you suspect your PSU to be the root cause of the issue, source(borrow, not buy) a reliably built PSU with higher wattage than necessary from a friend or neighbor and run your system off of it. If the issue persists, there's a chance that something in your system is overheating and your PSU wasn't to blame.
L
LightCloud
07-16-2021, 07:11 PM #2

Welcome to the forums, newcomer!
my PC
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.
my PSU Corsair RM750 (2021 version)
If you suspect your PSU to be the root cause of the issue, source(borrow, not buy) a reliably built PSU with higher wattage than necessary from a friend or neighbor and run your system off of it. If the issue persists, there's a chance that something in your system is overheating and your PSU wasn't to blame.

D
Dannyzorro
Junior Member
8
07-19-2021, 06:59 PM
#3
Thank you for your response. Here is my information.
CPU: Intel i7-12700KF
CPU cooler: Scythe Fuma 2 Rev.B
Motherboard: MSI PRO Z690-A WIFI DDR4
Memory: Corsair Vengeance RGB PRO 32Go (2 x 16Go) DDR4 3600MHz C18
Storage: Samsung 980 PRO 1TB + Samsung 970 Evo plus 2TB
GPU: Nvidia RTX 3070 FE
Power supply: Corsair RM750 (2021 version)
Case: Nzxt H510 Flow - CA-H52FW-01
Operating system: Windows 11
Display: Acer Nitro XV272UP + BenQ GL2460
BIOS version: 1.H0 (updated last year)
PSU: purchased from Amazon in May 2022
I believe the power supply might be the issue, though I'm not certain. Also, I added an extra SSD in April 2023. The problem seems to have appeared suddenly without a clear reason. I also suspect a voltage-related power outage, but I'm still trying to figure it out.
D
Dannyzorro
07-19-2021, 06:59 PM #3

Thank you for your response. Here is my information.
CPU: Intel i7-12700KF
CPU cooler: Scythe Fuma 2 Rev.B
Motherboard: MSI PRO Z690-A WIFI DDR4
Memory: Corsair Vengeance RGB PRO 32Go (2 x 16Go) DDR4 3600MHz C18
Storage: Samsung 980 PRO 1TB + Samsung 970 Evo plus 2TB
GPU: Nvidia RTX 3070 FE
Power supply: Corsair RM750 (2021 version)
Case: Nzxt H510 Flow - CA-H52FW-01
Operating system: Windows 11
Display: Acer Nitro XV272UP + BenQ GL2460
BIOS version: 1.H0 (updated last year)
PSU: purchased from Amazon in May 2022
I believe the power supply might be the issue, though I'm not certain. Also, I added an extra SSD in April 2023. The problem seems to have appeared suddenly without a clear reason. I also suspect a voltage-related power outage, but I'm still trying to figure it out.

C
Cosmic_rage
Junior Member
10
07-19-2021, 07:21 PM
#4
The RTX 3000 series experienced significant temporary load increases, pushing power supplies beyond their optimal performance range.
View: https://youtu.be/wnRyyCsuHFQ
This prompted recommendations for users to increase their PSU capacity beyond just selecting a well-made unit.
I also considered the possibility of voltage drops during power outages.
Be aware that simply replacing an old wall outlet won't fully resolve the problem. Hire a licensed electrician to inspect your wiring and outlets, then consider borrowing a PSU as suggested in my earlier post.
Additionally, having a UPS would be beneficial if you don’t already have one.
C
Cosmic_rage
07-19-2021, 07:21 PM #4

The RTX 3000 series experienced significant temporary load increases, pushing power supplies beyond their optimal performance range.
View: https://youtu.be/wnRyyCsuHFQ
This prompted recommendations for users to increase their PSU capacity beyond just selecting a well-made unit.
I also considered the possibility of voltage drops during power outages.
Be aware that simply replacing an old wall outlet won't fully resolve the problem. Hire a licensed electrician to inspect your wiring and outlets, then consider borrowing a PSU as suggested in my earlier post.
Additionally, having a UPS would be beneficial if you don’t already have one.