Don't write the Celeron 847 off - it is actually quite efficient! Sandy Bridge has quite good (not Haswell good) idle power consumption, and it's performance i

Don't write the Celeron 847 off - it is actually quite efficient! Sandy Bridge has quite good (not Haswell good) idle power consumption, and it's performance is much better than Atom. And if you're running Linux, you need to avoid the Atom N2xxx at all costs, the graphics are useless. The C847 graphics are good for desktop use (but not for anything more than light gaming) If you're worried about battery life and heat, trade out the HD for an SSD right away. I did that with an Acer Chromebook and it's quite nice - and the trade will probably make up for any increased CPU power draw at idle.