Forget octa-core smartphones - four cores prove that less is more

Manufacturers have been falling over themselves in 2015 to tell you how many cores they've managed to cram into their wafer-thin devices - six, seven, even eight - for the sake of more power, but this could be the end of the road.Qualcomm's recently-announced Snapdragon 820 chip is due to hit handsets in the first half of 2016, and unlike its octa-core predecessor (the 810) it's only sporting four cores.That might set alarm bells ringing, but techradar's spent some time with a 6.2-inch developer