Power fluctuation with only 2 computers?

[JC00]

I'm running 2 athlon xps side-by-side in a room. one has a 17" and the other has a 14" monitor. Computer A has the monitor plugged on to the psu at the back of the computer. Computer B is plugged directly to the ups.

At first both of the computers are plugged on an extension cord. No problem that is until I turn on the monitor a power fluction of some sort affects the monitor of the other computer.

Next, I tried plugging it in on the wall. The wall electrical sockets are always by pair so I plugged the other computer on the other extra slot. No luck. Still the same short power fluctuation.

Finally, I tried plugging it on a different wall electrical socket using an extension cord. I was expecting no more power fluctuation but I still got the same problem.

How can I make both computers run without having to compromise having the ability to turn on and off the monitors while making both computers run at the same time?

[Faustus]

Explain what you mean by Power flux, because it sounds like the standard "these monitors are to close together so the startup process of one messes with the other so you need to degause" type problem so far.

[JC00]

The monitor seem to almost turn off like there's not enough electricity. The monitors are 10 inches away from each other as well. They're both crts by the way.

[Faustus]

Turn off? Completely? That sounds like a brownout. Try turning some other stuff off in your place and see if that makes a difference.

[rallynavvie]

You said one is plugged into a UPS. Is the UPS showing discharge when you turn the other on, as in it's using its battery? Normally you'll just trip a breaker rather than brownout that bad. You may need to have an electrician come in and check out your wiring in your place. Best thing to do is have your computer outlet on its own breaker if it all possible, or at least the room where your computer is. This also helps eliminate feedback from other electrical appliances/devices on the same circuit. I had problems with my sump pump making my screen flicker when it came on since it was piggybacked on the office circuit. I put it on its own line and everything was fine.