Room lights slightly flicker with new PSU

Sassbogs

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Aug 2, 2013
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Hello everyone,

I am back with a new problem. I have recently upgraded my rig, and have noticed a strange phenomena when the system is running. I hope this post isn't too off-topic for Tom's Hardware, but I seem to get a lot of help here, so here goes.

Before I begin describing the issue, here are the specs:

i7 6850k
GTX 1080 Founders Edition
EVGA SuperNova G2 1000 Watt
MSI Godlike Gaming Carbon X99A
Samsung 960 Pro 512GB
Samsung 850 Pro 1TB
7200 RMP HDD 1TB

The system seems to work fine, but I'm worried there may be a power issue. I recently moved to a new apartment, and my old rig was working fine. Now, when powering on my current rig, the lights blink (like when turning on a hairdryer), and the lights continue to slightly flicker as long as the computer is left running. Sometimes, the issue won't be as noticeable, and it will sometimes get better after running the computer for a few hours. This doesn't seem to affect the computer, but I'm concerned there may be a power delivery issue with the PSU or with the circuit breaker. My old Corsair AX 850 watt didn't have this problem, and my fiances AX 750 watt PSU doesn't seem to cause this issue; and both were on the same circuit in the same apartment, sometimes running at the same time. It seems to only happen when I turn on the 1000 watt PSU.

This could be a multitude of issues. Maybe the wiring in this apartment is aluminum, rather than copper, and it can't handle the voltage/wattage of the new power supply. Perhaps there is a loose neutral wire in the panel box or some outlet somewhere, causing an issue. I have researched the possibilities enough to probably investigate myself, but I don't feel comfortable messing with home electrical systems myself, and I'm sure the staff at this apartment complex won't care enough to do anything. The light flickering seems to affect lamps plugged into any outlet in the affected room, as well as the ceiling light (which I think is not up to code having ceiling fans/lights on the same circuit as wall outlets).

My fiance's 750 watt Corsair PSU doesn't seem to create a problem, and my old 850 watt PSU didn't either. Could this be an issue with my apartment wiring, or a fault in the EVGA 1000 watt PSU? Might it also be that the new system has a CPU water pump and RGB strips, while my old system was all air and no lighting (voltage draw issue)?

Suggestions greatly appreciated.
 
Solution
Grab a line conditioning UPS, will keep the PC from seeing a brownout. Get a Killavolt to check the ac voltage (120V nominal can be from 110V to 123V) and the power draw of the system. Don't forget the monitors and anything else plugged into the same circuit. The room receptacles and lights are probably on the same circuit. Not against code, just poor practice. I like to keep my receptacles and lights separate. A 20 Amp circuit delivers 1920 Watts 10 outlets are allowed on a circuit at 180W each demand factor with a receptacle required on a wall so that 6 ft either side is covered. a 12x12ft room has a minimum of 4 rec, one in the center of each wall. Probably have two rooms on the same circuit and their lights, and maybe a...

kraelic

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Feb 12, 2006
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Grab a line conditioning UPS, will keep the PC from seeing a brownout. Get a Killavolt to check the ac voltage (120V nominal can be from 110V to 123V) and the power draw of the system. Don't forget the monitors and anything else plugged into the same circuit. The room receptacles and lights are probably on the same circuit. Not against code, just poor practice. I like to keep my receptacles and lights separate. A 20 Amp circuit delivers 1920 Watts 10 outlets are allowed on a circuit at 180W each demand factor with a receptacle required on a wall so that 6 ft either side is covered. a 12x12ft room has a minimum of 4 rec, one in the center of each wall. Probably have two rooms on the same circuit and their lights, and maybe a hall rec. 120v x20A x0.8 de-rating. My lights dim when my color laser printer heats up and I have copper wiring. Aluminum was used in the 60s and 70s and then abandoned for branch circuits. Aluminum Panel feeders are still ok. Would need to get a qualified electrician to work on your boxes or panel to check for loose neutrals or shared neutrals which carry unbalanced load. And a 240/208V surge protector for the whole panel would not hurt.
 
Solution

Sassbogs

Honorable
Aug 2, 2013
18
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10,520
Thanks for the reply. I agree that it is probably just some cut corners with the wiring, a <20amp panel, or multiple rooms on the same circuit.

I have seen a lot of forums suggest a UPS to people experiencing the same or similar problem. I have made a habit of hitting the switch on the surge protector after turning off the computer and monitor, will this negatively affect the operation or safe use of a UPS? Or will the UPS replace the surge protector?
 

kraelic

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Feb 12, 2006
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https://www.sweetwater.com/insync/line-interactive-ups/

You can put the UPS before the power strip, and hitting the switch just disconnects any phantom load from the pc on the UPS when hooked up this way. The UPS should adjust the 'dirty' line voltage and offer a consistant output with limited time of backup power to save a file and shutdown properly on power failure. Some connect by serial or USB and software automates a safe shutdown. This is to protect the pc, not keep the light from dimming.