AMD Radeon R9 M485X vs ATI Mobility Radeon HD 3870

VS

AMD Radeon R9 M485X

ATI Mobility Radeon HD 3870

We compared two Mobile platform GPUs: 8GB VRAM Radeon R9 M485X and 512MB VRAM Mobility Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M485X 's Advantages

Released 7 years and 11 months late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 54.40GB/s)

1728 additional rendering cores

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 M485X +601%

2.961 TFLOPS

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon R9 M485X

VS

Mobility Radeon HD 3870

Graphics Card

May 2016

Release Date

Jun 2008

Crystal System

Generation

M8x

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

850 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

54.40GB/s

Render Config

32

Compute Units

4

-

2048

Shading Units

320

128

TMUs

16

32

ROPs

16

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

10.56 GPixel/s

92.54 GTexel/s

Texture Rate

10.56 GTexel/s

2.961 TFLOPS

FP16 (half)

-

2.961 TFLOPS

FP32 (float)

422.4 GFLOPS

185.1 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

250W

TDP

55W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Amethyst

GPU Name

M88

Amethyst XT

GPU Variant

-

GCN 3.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

5 billion

Transistors

0.666 billion

366 mm²

Die Size

192 mm²

Graphics Features

12 (12_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.0

OpenCL

N/A

1.2

Vulkan

N/A

-

6.3

Shader Model

4.1

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