In the two previous articles (links at the end), I explored some of the features and properties of Performance (P) cores in Apple’s latest M4 chips. This article looks at their Efficiency (E) cores by comparison. M4 family In the three current M4 designs, there are only two variations in terms of E cores: Base M4, with 6 E cores, except for a cheaper variant with only 4 active E cores. M4 Pro and Max, with 4 E cores, including ‘binned’ variants. Apple is expected to release an Ultra variant in 2...