Have you considered flash sticks or sd cards as a storage?
Try screwing around the OS options and power management, it may yeld some watts.
What GPU they have? If it is integrated with no dedicated memory then do not crunch with it. It will eat memory bandwidth from cpu tasks.
Playing with voltages can save quite some power. Especially if you downclock.
yes. I opted not to use thr integrated gpu aside from higher watts and more heat. it hurts cpu performance.
ill go boincos or gentoo diskless and and thinking runing mosix for easy managment
yeah.. doing alot of undervolting and disabling some. no need for extra cooling