AMD Radeon R9 M390 Mac Edition vs AMD Radeon E8870

VS

AMD Radeon R9 M390 Mac Edition

AMD Radeon E8870

We compared two Mobile platform GPUs: 2GB VRAM Radeon R9 M390 Mac Edition and 4GB VRAM Radeon E8870 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 96.00GB/s)

256 additional rendering cores

AMD Radeon E8870 's Advantages

More VRAM (4GB vs 2GB)

Lower TDP (75W vs 80W)

Score

Benchmark

FP32 (float)

Radeon R9 M390 Mac Edition +27%

1.962 TFLOPS

Radeon E8870

1.536 TFLOPS

Radeon R9 M390 Mac Edition

VS

Radeon E8870

Graphics Card

May 2015

Release Date

Sep 2015

Crystal System

Generation

Embedded

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1365 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

174.7GB/s

Bandwidth

96.00GB/s

Render Config

16

Compute Units

12

-

1024

Shading Units

768

64

TMUs

48

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

30.66 GPixel/s

Pixel Rate

16.00 GPixel/s

61.31 GTexel/s

Texture Rate

48.00 GTexel/s

-

1.962 TFLOPS

FP32 (float)

1.536 TFLOPS

122.6 GFLOPS

FP64 (double)

96.00 GFLOPS

Board Design

80W

TDP

75W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

Saturn

Pitcairn PRO (215-0828062)

GPU Variant

Saturn PRO

GCN 1.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

2.08 billion

212 mm²

Die Size

160 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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