My wife and I have identical 7th gen i5 laptops, except hers has Windows while mine has Mint. I regularly use mine in front of the TV, and recently she tried to do the same. We had to turn the TV volume up and it took a minute to figure out why. The fans on her laptop were running flat out to keep it cool because Windows had so much going on in the background that the CPU was at 100%.
She was ready to scrap the laptop because it was so slow, thinking that it was normal.