[Bud]

This makes no sense. RAM generates heat just as CPU does, and RAM also actually does consume a substantial percentage of laptop power. However, said usage isn't related to how much RAM is being used, really; it's a constant usage rate to keep the current RAM state alive.

[ptaipale]

Well, it makes sense to me: CPU and GPU take in the order of 10 times as much power as RAM. RAM power usage just isn't depending on load, like that of CPU and graphics.