the A5, the memory interface of the A5X is twice the size. The A5X memory interface subsystem utilizes four 32 bits wide LPDDR2 memory controllers.

Unlike the Apple A4 and the A5, the A5X uses a metal heat spreader (along with thermal paste) to cover the flip chip underneath. The die takes up 162.94 mm² of area--a 36.5% increase in area used over the 119.32 mm² die of the S5L8940 version of the A5. The A5X does