The new iPad isn't waltzing into a competitive vacuum. That wow-worthy display notwithstanding, Apple still has to go head-to-head on performance.
Chip-review site Anandtech confirmed with Apple that sitting right next to the A5X's quad-core GPU (graphics processing unit) is a dual-core CPU (central processing unit).
The upshot is that Apple is pitting the A5X's quad-core GPU against a quad-core Nvidia CPU.
So, how does it stack up against, for example, Nvidia's chip in the upcoming Asus Transformer Pad Infinity which boasts a 1920x1200 display? Anandtech tried to provide some answers.
Anandtech's take on Apple's A5X vs. the Tegra 3 chip in the Asus tablet:
- A5X: Doubles GPU execution resources compared with the A5. Imagination Technologies' PowerVR SGX 543 GPU (which the A5X uses) can be expanded simply by increasing processor core count. So, 2x* the execution resources means 2x the performance of the A5.
- A5X: Expect around a 2x performance gain over Tegra 3 in GLBenchmark (Egypt) at 720p. Not Apple's claimed 4x.
- A5X: With the new iPad's Retina Display boasting 4x the pixels of the iPad 2, a 2x increase in GPU horsepower isn't enough to maintain performance. There may be some issues with resolution-intensive apps.
- And the A5X's CPU? Speculating on why Apple did not choose a quad-core CPU: Many iOS apps still don't take advantage of even two cores.
Updated at 8:45 p.m. PST: condensed bullet point discussion.