Hi everyone, hope you had a good weekend. I noticed some odd power consumption with my late 2015 iMac 5K and an looking for feedback.
The iMac has the Core i7, M395X gpu, 24GB ram, and 500GB SSD internal running the latest High Sierra. Connected are a couple hard drives, printer, mouse, keyboard, and everything is then attached to a 1500PFCLCD CyberPower UPS.
By chance, I had the UPS "watt output" display on and I noticed that it read 0 but then every 20 seconds or so it would flash about 50 watts even while the entire computer is shut down. Note: the iMac was not in sleep, power nap, or anything like that; it was completely shut down.
I then proceeded to unplug each peripheral until it was only the iMac plugged into the UPS and still saw this strange periodic spike in watt usage at around 20-second intervals while it was turned off.
Wondering if it was the UPS, I then plugged the iMac directly into the outlet with a kill-a-watt meter and saw something different: this time, the watt usage was around 4 but it would appear every 1-2 seconds.
My best guess is the 4-watt trickle I saw on the kill-a-watt was standby power consumption. Am I correct?
My second question is why do you think I'm seeing such a different readout on the UPS compared to the kill-a-watt meter? Both the watt usage and the frequency at which it was shown was way different.
Thank you for your time!
The iMac has the Core i7, M395X gpu, 24GB ram, and 500GB SSD internal running the latest High Sierra. Connected are a couple hard drives, printer, mouse, keyboard, and everything is then attached to a 1500PFCLCD CyberPower UPS.
By chance, I had the UPS "watt output" display on and I noticed that it read 0 but then every 20 seconds or so it would flash about 50 watts even while the entire computer is shut down. Note: the iMac was not in sleep, power nap, or anything like that; it was completely shut down.
I then proceeded to unplug each peripheral until it was only the iMac plugged into the UPS and still saw this strange periodic spike in watt usage at around 20-second intervals while it was turned off.
Wondering if it was the UPS, I then plugged the iMac directly into the outlet with a kill-a-watt meter and saw something different: this time, the watt usage was around 4 but it would appear every 1-2 seconds.
My best guess is the 4-watt trickle I saw on the kill-a-watt was standby power consumption. Am I correct?
My second question is why do you think I'm seeing such a different readout on the UPS compared to the kill-a-watt meter? Both the watt usage and the frequency at which it was shown was way different.
Thank you for your time!