ATI Mobility Radeon HD 3870 vs AMD Radeon R9 M295X Mac Edition

VS

ATI Mobility Radeon HD 3870

AMD Radeon R9 M295X Mac Edition

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 4GB VRAM Radeon R9 M295X Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 250W)

AMD Radeon R9 M295X Mac Edition 's Advantages

Released 6 years and 5 months late

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (174.3GB/s vs 54.40GB/s)

1728 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon R9 M295X Mac Edition +725%

3.482 TFLOPS

Mobility Radeon HD 3870

VS

Radeon R9 M295X Mac Edition

Graphics Card

Jun 2008

Release Date

Nov 2014

M8x

Generation

Crystal System

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

850 MHz

Memory Clock

1362 MHz

Memory

512MB

Memory Size

4GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

256bit

54.40GB/s

Bandwidth

174.3GB/s

Render Config

4

Compute Units

32

-

320

Shading Units

2048

16

TMUs

128

16

ROPs

32

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

27.20 GPixel/s

10.56 GTexel/s

Texture Rate

108.8 GTexel/s

-

FP16 (half)

3.482 TFLOPS

422.4 GFLOPS

FP32 (float)

3.482 TFLOPS

84.48 GFLOPS

FP64 (double)

217.6 GFLOPS

Board Design

55W

TDP

250W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

Amethyst

-

GPU Variant

Amethyst XT

TeraScale

Architecture

GCN 3.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

5 billion

192 mm²

Die Size

366 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (12_0)

3.3

OpenGL

4.6

N/A

OpenCL

2.0

N/A

Vulkan

1.2

-

4.1

Shader Model

6.3

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