AMD Radeon HD 6670A vs AMD Radeon R9 M390 Mac Edition

VS

AMD Radeon HD 6670A

AMD Radeon R9 M390 Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6670A and 2GB VRAM Radeon R9 M390 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6670A 's Advantages

Lower TDP (45W vs 80W)

AMD Radeon R9 M390 Mac Edition 's Advantages

Released 4 years and 1 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (174.7GB/s vs 64.00GB/s)

544 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6670A

0.576 TFLOPS

Radeon R9 M390 Mac Edition +240%

1.962 TFLOPS

Radeon HD 6670A

VS

Radeon R9 M390 Mac Edition

Graphics Card

Apr 2011

Release Date

May 2015

All-In-One

Generation

Crystal System

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

1365 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

64.00GB/s

Bandwidth

174.7GB/s

Render Config

6

Compute Units

16

-

480

Shading Units

1024

24

TMUs

64

8

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

4.800 GPixel/s

Pixel Rate

30.66 GPixel/s

14.40 GTexel/s

Texture Rate

61.31 GTexel/s

-

576.0 GFLOPS

FP32 (float)

1.962 TFLOPS

-

FP64 (double)

122.6 GFLOPS

Board Design

45W

TDP

80W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Turks

GPU Name

Pitcairn

Turks XT (215-0803000)

GPU Variant

Pitcairn PRO (215-0828062)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.716 billion

Transistors

2.8 billion

118 mm²

Die Size

212 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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