GPUIntegrated (APU)Released Oct 22, 2014

Apple A8X GPU (PowerVR GXA6850)

2 GB LPDDR3-1600 · 128-bit · 256 cores

The A8X GPU is an eight-cluster PowerVR GXA6850, a semi-custom Apple design based on PowerVR Series6XT and used only in the A8X chip of the iPad Air 2, released in October 2014. Apple's customization doubled the cluster count of the A8's GPU, giving the A8X 2.5 times the graphics performance of the A7. It shares 2 GB of LPDDR3 memory with the CPU over a dual-channel interface providing 25.6 GB/s. The iPad Air 2 is supported up to iPadOS 15.

General

Manufacturer: Apple
Model: A8X GPU (PowerVR GXA6850)
Segment: Integrated (APU)
GPU chip: Apple A8X
Architecture: PowerVR Series6XT (Rogue)
Release date: Oct 22, 2014
Price: Search on Amazon

Memory

Memory size: 2 GB
Memory type: LPDDR3-1600 (unified)
Bus width: 128-bit
Bandwidth: 25.6 GB/s
Memory clock: —

Clocks & silicon

GPU clock: —
Boost clock: —
Shader units: 256 ALUs (8 clusters)
Tensor / AI cores: —
RT cores: —
Transistors: 3 billion
Technology (nm): 20 nm
TSMC 20nm
TDP / TBP: —

Interface & APIs

Bus interface: Integrated (on-die)
SLI / multi-GPU: None
DirectX: N/A (iOS / iPadOS)
OpenGL: ES 3.0 (deprecated)
Vulkan: via MoltenVK
Other APIs: Metal 2, OpenGL ES 3.0

AI support

Precisions: FP8FP16BF16INT8INT4TF32FP64
AI accelerator: —
Peak AI TOPS: —
Notes: The GPU supports FP16 and INT8 compute through Metal. The A8X has no Neural Engine, and Apple does not publish GPU clock speeds.

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