[SOLVED] Drop in 3.3V and 12V

[SpaceyWarrior]

When I bought my new parts in October 2019 I ran a benchmark and logged everything with HWinfo64, my 3.3V stayed at 3.305 for most of it and my 12V only dropped as low as 11.808

Now after a while I ran hwinfo and noticed my 3.3V was at 3.285 while the computer was idling. When I ran the benchmark it went to 3.265 and the 12V hit 11.736 for the first time.

Should I be worried?

 

[velocityg4]

Do you have something to check your AC voltage? You may want to get something like a wattman to monitor your power lines. Also what PSU?

 

[SpaceyWarrior]

Do you have something to check your AC voltage? You may want to get something like a wattman to monitor your power lines. Also what PSU?

No I don't but that value shouldn't vary that much since I'm using the same software to measure it as before, even disabled updates

CX550

 

[velocityg4]

Some voltage droop under load should be expected. The voltages are within the +-5% tolerance for ATX spec. The sensors on the motherboard may also not be totally accurate. You need a digital multimeter connected to the PSU under load for an accurate reading.

Also is that the CX550 with green letters or grey letters? The green letter version is garbage.

 

[SpaceyWarrior]

Some voltage droop under load should be expected. The voltages are within the +-5% tolerance for ATX spec. The sensors on the motherboard may also not be totally accurate. You need a digital multimeter connected to the PSU under load for an accurate reading.

Also is that the CX550 with green letters or grey letters? The green letter version is garbage.

Not under load. Idle
I left it idling for an hour and it never went back to 305
It's the grey label.

 

[velocityg4]

PSU Tolerance Table
Voltage Rail	Tolerance	Minimum Voltage	Maximum Voltage
+3.3VDC	± 5%	+3.135 VDC	+3.465 VDC
+5VDC	± 5%	+4.750 VDC	+5.250 VDC
+5VSB	± 5%	+4.750 VDC	+5.250 VDC
-5VDC (if used)	± 10%	-4.500 VDC	-5.500 VDC
+12VDC	± 5%	+11.400 VDC	+12.600 VDC
-12VDC	± 10%	-10.800 VDC	- 13.200 VDC

Source: https://www.lifewire.com/power-supply-voltage-tolerances-2624583

It's all well within safe tolerances. Until you get a digital multimeter reading. I'd take sensor readings with a dose of skepticism. Everything may be closer to spec than you are seeing in the software monitor.
https://www.neoseeker.com/Articles/Hardware/Reports/motherboardvoltages/3.html

The Grey CX series are pretty decent.