AMD Radeon R9 M395X Mac Edition vs AMD Radeon HD 8870M

VS

AMD Radeon R9 M395X Mac Edition

AMD Radeon HD 8870M

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M395X Mac Edition and 2GB VRAM Radeon HD 8870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M395X Mac Edition 's Advantages

Released 2 years and 1 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (174.7GB/s vs 72.00GB/s)

1408 additional rendering cores

AMD Radeon HD 8870M 's Advantages

Boost Clock775MHz

Score

Benchmark

FP32 (float)

Radeon R9 M395X Mac Edition +275%

3.723 TFLOPS

Radeon HD 8870M

0.992 TFLOPS

Radeon R9 M395X Mac Edition

VS

Radeon HD 8870M

Graphics Card

May 2015

Release Date

Apr 2013

Crystal System

Generation

Solar System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

725 MHz

-

Boost Clock

775 MHz

1365 MHz

Memory Clock

1125 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

72.00GB/s

Render Config

32

Compute Units

10

-

2048

Shading Units

640

128

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

29.09 GPixel/s

Pixel Rate

12.40 GPixel/s

116.4 GTexel/s

Texture Rate

31.00 GTexel/s

3.723 TFLOPS

FP16 (half)

-

3.723 TFLOPS

FP32 (float)

992.0 GFLOPS

232.7 GFLOPS

FP64 (double)

62.00 GFLOPS

Board Design

250W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

Venus

Amethyst XT

GPU Variant

Venus XT (216-0846000)

GCN 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

1.5 billion

366 mm²

Die Size

123 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.0

OpenCL

2.1 (1.2)

1.2

Vulkan

1.2.170

-

6.3

Shader Model

6.5 (5.1)

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