AMD Radeon HD 6850M vs AMD Radeon R9 M390 Mac Edition

VS

AMD Radeon HD 6850M AMD Radeon R9 M390 Mac Edition

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6850M 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 6850M 's Advantages

Lower TDP (50W vs 80W)

AMD Radeon R9 M390 Mac Edition 's Advantages

Released 4 years and 4 months late

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (174.7GB/s vs 25.60GB/s)

224 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6850M

1.08 TFLOPS

Radeon R9 M390 Mac Edition +81%

1.962 TFLOPS

Radeon HD 6850M

VS

Radeon R9 M390 Mac Edition

Graphics Card

Jan 2011

Release Date

May 2015

Vancouver

Generation

Crystal System

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

800 MHz

Memory Clock

1365 MHz

Memory

1024MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

25.60GB/s

Bandwidth

174.7GB/s

Render Config

-

SM Count

-

10

Compute Units

16

800

Shading Units

1024

40

TMUs

64

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

10.80 GPixel/s

Pixel Rate

30.66 GPixel/s

27.00 GTexel/s

Texture Rate

61.31 GTexel/s

-

FP16 (half)

-

1080 GFLOPS

FP32 (float)

1.962 TFLOPS

-

FP64 (double)

122.6 GFLOPS

Graphics Processor

Granville

GPU Name

Pitcairn

Granville PRO

GPU Variant

Pitcairn PRO (215-0828062)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.04 billion

Transistors

2.8 billion

166 mm²

Die Size

212 mm²

Board Design

50W

TDP

80W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

None

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

-

CUDA

-

5.0

Shader Model

5.1

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