AMD Radeon R9 M395 Mac Edition vs AMD Radeon R5 M255

VS

AMD Radeon R9 M395 Mac Edition

AMD Radeon R5 M255

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M395 Mac Edition and 2GB VRAM Radeon R5 M255 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M395 Mac Edition 's Advantages

Released 7 months late

Larger VRAM bandwidth (174.7GB/s vs 32.00GB/s)

1408 additional rendering cores

AMD Radeon R5 M255 's Advantages

Boost Clock940MHz

Score

Benchmark

FP32 (float)

Radeon R9 M395 Mac Edition +314%

2.989 TFLOPS

Radeon R5 M255

0.721 TFLOPS

Radeon R9 M395 Mac Edition

VS

Radeon R5 M255

Graphics Card

May 2015

Release Date

Oct 2014

Crystal System

Generation

Gem System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

940 MHz

1365 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

32.00GB/s

Render Config

28

Compute Units

6

-

1792

Shading Units

384

112

TMUs

24

32

ROPs

8

-

L1 Cache

16 KB (per CU)

-

L2 Cache

256 KB

-

Theoretical Performance

26.69 GPixel/s

Pixel Rate

7.520 GPixel/s

93.41 GTexel/s

Texture Rate

22.56 GTexel/s

-

FP16 (half)

721.9 GFLOPS

2.989 TFLOPS

FP32 (float)

721.9 GFLOPS

373.6 GFLOPS

FP64 (double)

45.12 GFLOPS

Board Design

250W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

Topaz

Amethyst PRO (216-0872004)

GPU Variant

Topaz PRO (216-0858030)

GCN 3.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

1.55 billion

366 mm²

Die Size

125 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.0

OpenCL

2.1

1.2

Vulkan

1.2.170

-

6.3

Shader Model

6.5

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