MSI Afterburner Question

Hi community

I have a i5 4460 with Intel HD graphics 4600 which is disabled via device manager and i have a MSI GTX 970 and i can play all my games ultra 1080p 60fps fine.

I was just looking in afterburner to see if there is a way to monitor my computers power draw from the wall and i scrolled down and i saw GPU1 as normal idle and then i kept going down looking for anything to do with power draw then i saw it say GPU 2 and the green line on the chart just kept going up and down making rectangle shapes???

I only have one graphics card so what is GPU2 monitoring?? it just keeps going 0% to 100% to 0% to 100%