what I have to do with those programs?
Just run them. A GPU core burner and Prim95 doing small FFT both require very little memory transfer, and a lot of arithmetic, so these programs push the system to use as much power as possible, to the point of thermal throttling even with the best air coolers.
I have an LED strip, both basestations, my PC, monitor and my 5K all running from powerpoints near each other in the same room, would this be an issue?
Doubtful. The LED strip, if it is on the order of 100W or so, and makes lots of electrical noise, possibly, but unlikely. Usually you need to draw enough power to make the voltage on the line sag from perhaps 120V to 100V, and this is not likely to happen without drawing maybe 1500W from a poorly connected plug with poor wiring.
Reportedly, that basically did happen at CES though.