AMD Radeon R9 M390 Mac Edition vs AMD Radeon R9 M485X

VS

AMD Radeon R9 M390 Mac Edition

AMD Radeon R9 M485X

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 8GB VRAM Radeon R9 M485X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390 Mac Edition 's Advantages

Larger VRAM bandwidth (174.7GB/s vs 160.0GB/s)

Lower TDP (80W vs 250W)

AMD Radeon R9 M485X 's Advantages

Released 1 years late

More VRAM (8GB vs 2GB)

1024 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 M390 Mac Edition

1.962 TFLOPS

Radeon R9 M485X +50%

2.961 TFLOPS

Radeon R9 M390 Mac Edition

VS

Radeon R9 M485X

Graphics Card

May 2015

Release Date

May 2016

Crystal System

Generation

Crystal System

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1365 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

174.7GB/s

Bandwidth

160.0GB/s

Render Config

16

Compute Units

32

-

1024

Shading Units

2048

64

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

30.66 GPixel/s

Pixel Rate

23.14 GPixel/s

61.31 GTexel/s

Texture Rate

92.54 GTexel/s

-

FP16 (half)

2.961 TFLOPS

1.962 TFLOPS

FP32 (float)

2.961 TFLOPS

122.6 GFLOPS

FP64 (double)

185.1 GFLOPS

Board Design

80W

TDP

250W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

Amethyst

Pitcairn PRO (215-0828062)

GPU Variant

Amethyst XT

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

5 billion

212 mm²

Die Size

366 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

5.1

Shader Model

6.3

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