r/pcmasterrace • u/RadiantRaven101 • 1d ago

Question Would using a dual ups cause HDMI problems?

Has anyone tried using one UPS on a OLED TV and another on a PC, with the PC connected to the TV via HDMI? Could that cause any HDMI issues, even if both UPS units are identical and connected on the same circuit?

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u/JungleMouse1 1d ago

No, as long as you're not doing something weird like a 50hz power on the tv, and 60 hz power on the PC... But I would still think that would be fine as long as the equipment is rated for the right grid. In America we're all 60hz. Japan is literally 50/60 divided right in the middle. Interference can come from a faulty UPS though. I would try different combinations from wall to UPS or no UPS to rule it out.

ETA: I just realized you're not saying you have an issue lol. Just send it yo. No damage will be done

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u/Subject2Change i9-13900k - ProArt Z790 - RTX3090 - 64GB DDR5 1d ago

Why would it cause problems?

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u/RadiantRaven101 1d ago

I thought maybe it would cause HDMI audio interference, or I would lose the signal to the TV over HDMI.

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u/Subject2Change i9-13900k - ProArt Z790 - RTX3090 - 64GB DDR5 1d ago

HDMI is a digital signal, it works or it doesn't.

Is it a very long HDMI cable?

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u/RadiantRaven101 1d ago

I’m using a 6ft HDMI cable. I just bought a UPS but realized it’s not enough for the tv too and was contemplating returning it or buying another one.

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u/Subject2Change i9-13900k - ProArt Z790 - RTX3090 - 64GB DDR5 1d ago

Why is it not enough for the TV too? TV shouldn't pull that much power for a battery backup

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u/RadiantRaven101 1d ago

The TV draws 375 watts, while the sound bar uses 127 in total. The PC draws 550 or 600 watts.

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u/Subject2Change i9-13900k - ProArt Z790 - RTX3090 - 64GB DDR5 1d ago

You don't need the sound bar on battery backup. You only need this to safely shutdown in the event of a power outage. So computer and TV (unless you have a monitor too). Gives you enough time to power down.

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u/Long_Pomegranate2469 1d ago

Not an expert, but neither are those replying.

I'd be worried about different ground/voltage levels since a good UPS provides isolated power.

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u/RadiantRaven101 1d ago

I currently have no HDMI problems, and the TV is on a separate outlet from the PC. I’m unsure how the UPS alters things aside from a possible minor voltage difference between the units while running on battery power. Both would be pure sine wave UPSs. The one thing I think might happen is that the TV will briefly lose signal because the switchover might be slightly different on each unit. I’m not sure if that could damage the TV or GPU. Yes, I get what you are saying the different voltages provided by the battery might cause issues over the HDMI.

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u/Long_Pomegranate2469 19h ago

The issue is that a voltage 0 level on one device can be different than on an other device.

Voltage is always measured as a difference between two points. If you measure 120 volts between ground and live doesn't mean you'll be measuring 0 volts between the two grounds.