MobileRead Forums - View Single Post - eReaders, CPU die-shrinks and battery life.

Hrafn · 05-14-2015, 01:49 AM

I recently came across a comparison chart on the Russian Onyx-Boox site listing the exact processor models on their current generation of eReaders. Looking their specs up on Wikipedia, I discovered that they were all 40nm. Given that Intel is up to 14nm, that surprised me, so I looked further.

Looking around on Wikipedia, I discovered that 28nm Cortex A9 CPUs are widely available, and from this 2012 article, that they've been around for at least 3 years, and "roughly 25-30% less power consumption" than the previous generation.

How quick are the various e-Reader manufacturers (both the big players and the independents) to move to newer/more efficient CPUs, and specifically the current 28nm technology? Most of the specs I read don't give exact CPU models, so it's hard to tell.

Given that battery life is a big selling point with eReaders, and weight (which is affected by battery size) is a reasonably important differentiating factor, I would have thought they'd be reasonably aggressive on this point.

Are 28nm eReaders already out there (just not with Onyx-Boox)? Are they coming?

05-14-2015, 01:49 AM	#1
Hrafn Fanatic Posts: 520 Karma: 846170 Join Date: Feb 2011 Location: New Zealand Device: Onyx Boox Poke 5, Samsung Galaxy Tab S5e 10.5	eReaders, CPU die-shrinks and battery life. I recently came across a comparison chart on the Russian Onyx-Boox site listing the exact processor models on their current generation of eReaders. Looking their specs up on Wikipedia, I discovered that they were all 40nm. Given that Intel is up to 14nm, that surprised me, so I looked further. Looking around on Wikipedia, I discovered that 28nm Cortex A9 CPUs are widely available, and from this 2012 article, that they've been around for at least 3 years, and "roughly 25-30% less power consumption" than the previous generation. How quick are the various e-Reader manufacturers (both the big players and the independents) to move to newer/more efficient CPUs, and specifically the current 28nm technology? Most of the specs I read don't give exact CPU models, so it's hard to tell. Given that battery life is a big selling point with eReaders, and weight (which is affected by battery size) is a reasonably important differentiating factor, I would have thought they'd be reasonably aggressive on this point. Are 28nm eReaders already out there (just not with Onyx-Boox)? Are they coming?