
Ah, so that's why they killed Atom.
Intel has never been spectacular at energy savings on mobile when compared to Qualcomm, but I do remember that Atom offered better raw performance on single and multi threaded integer computation, so it was generally better for sustained load.
I also remember being able to buy ITX motherboards with an integrated Atom CPU, and despite being low power Intel still felt the need to slap a heat sink on it, which tells me that they were only "low power" relative to other x86 chipsets, nowhere close to a Qualcomm SOC in terms of energy sipping.
Naturally I'd expect Atom chips to burst into flames without a tall-ish, fanned heatsink, cuz that's how they're normally sold outside of the mobile market.