[jbkkd]

The major difference between a CPU and, say, an oven, is that the former runs 24/7, whereas an the latter would run for a short period of time.

Back of the envelope calculation here:

Assuming an average oven consumes 2kWh, and a CPU 0.1kWh:

Oven for four hours (average weekly usage) would be 2 * 4 = 8kWh weekly.

CPU for 24 hours, 7 days a week = 0.1 * 24 * 7 = 16.8kWh weekly.

[Dinjector]

The flaws in your calculations are apparent when we realize that modern CPUs clock down when they are not busy. You would assume this would be common knowledge on a site called Hacker News.

[gspr]

Interesting choice of units, kWh per hour?