Come to think of it I should test my 4k monitors. They throw off a decent amount of heat so I suspect they must be using a good 50w or so maybe even more. My office gets very warm when I'm working from home and have all monitors turned on. The work PC surprisingly only uses like 15w, which is pretty crazy. As I upgrade stuff in my server room I'm thinking of using such PCs instead of building custom servers as the power usage is just so much lower and they are also super cheap on Ebay. Hard to justify a custom build now cost and power use wise.