GPUMobileReleased Oct 27, 2016

AMD Radeon Pro 455

2 GB GDDR5 · 128-bit · 768 cores

A Polaris 11 GPU made for Apple, announced on October 27, 2016 in the redesigned 15-inch MacBook Pro with Touch Bar. It came standard in the 2.7 GHz configuration, sitting between the Radeon Pro 450 and the optional Radeon Pro 460, with 12 compute units, about 1.3 TFLOPS and 2 GB of GDDR5 on a 128-bit bus, in a power envelope under 35 W. macOS switches automatically between it and the processor's integrated Intel HD Graphics 530 to save power.

General

Manufacturer: AMD
Model: Radeon Pro 455
Segment: Mobile
GPU chip: Polaris 11
Architecture: GCN 4 (Polaris)
Release date: Oct 27, 2016
Price: Search on Amazon

Memory

Memory size: 2 GB
Memory type: GDDR5
Bus width: 128-bit
Bandwidth: 80 GB/s
Memory clock: 1,250 MHz

Clocks & silicon

GPU clock: 855 MHz
Boost clock: —
Shader units: 768 Stream Processors (12 CU)
Tensor / AI cores: —
RT cores: —
Transistors: 3 billion
Technology (nm): 14 nm
GF 14 nm
TDP / TBP: 35 W

Interface & APIs

Bus interface: PCIe 3.0 x8
SLI / multi-GPU: None
DirectX: 12 (12_0)
OpenGL: 4.1
Vulkan: via MoltenVK
Other APIs: Metal 2, OpenCL 1.2 (macOS)

AI support

Precisions: FP8FP16BF16INT8INT4TF32FP64
AI accelerator: None (no matrix accelerator)
Peak AI TOPS: —
Notes: Polaris has no matrix or AI accelerator. FP16 is supported but runs at the same rate as FP32, with no packed-math speed-up and no INT8 or INT4 dot-product instructions. Double precision runs at 1/16 of the FP32 rate.