AMD Radeon R9 M485X vs AMD Radeon HD 6870M

VS

AMD Radeon R9 M485X

AMD Radeon HD 6870M

We compared two Mobile platform GPUs: 8GB VRAM Radeon R9 M485X and 1024MB VRAM Radeon HD 6870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M485X 's Advantages

Released 5 years and 4 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (160.0GB/s vs 64.00GB/s)

1248 additional rendering cores

AMD Radeon HD 6870M 's Advantages

Lower TDP (50W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M485X +174%

2.961 TFLOPS

Radeon HD 6870M

1.08 TFLOPS

Radeon R9 M485X

VS

Radeon HD 6870M

Graphics Card

May 2016

Release Date

Jan 2011

Crystal System

Generation

Vancouver

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

MXM-B (3.0)

Clock Speeds

-

1250 MHz

Memory Clock

1000 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

160.0GB/s

Bandwidth

64.00GB/s

Render Config

32

Compute Units

10

-

2048

Shading Units

800

128

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

10.80 GPixel/s

92.54 GTexel/s

Texture Rate

27.00 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

1080 GFLOPS

185.1 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

50W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

Granville

Amethyst XT

GPU Variant

Granville XT (216-0769024)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

1.04 billion

366 mm²

Die Size

166 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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