AMD Radeon HD 8870M vs AMD Radeon R9 M290X

VS

AMD Radeon HD 8870M

AMD Radeon R9 M290X

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8870M and 4GB VRAM Radeon R9 M290X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M290X 's Advantages

Released 9 months late

Boost Clock has increased by 16% (900MHz vs 775MHz)

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (153.6GB/s vs 72.00GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8870M

0.992 TFLOPS

Radeon R9 M290X +132%

2.304 TFLOPS

Radeon HD 8870M

VS

Radeon R9 M290X

Graphics Card

Apr 2013

Release Date

Jan 2014

Solar System

Generation

Crystal System

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

725 MHz

Base Clock

850 MHz

775 MHz

Boost Clock

900 MHz

1125 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

72.00GB/s

Bandwidth

153.6GB/s

Render Config

10

Compute Units

20

-

640

Shading Units

1280

40

TMUs

80

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.40 GPixel/s

Pixel Rate

28.80 GPixel/s

31.00 GTexel/s

Texture Rate

72.00 GTexel/s

-

992.0 GFLOPS

FP32 (float)

2.304 TFLOPS

62.00 GFLOPS

FP64 (double)

144.0 GFLOPS

Board Design

Unknown

TDP

100W

-

Portable Device Dependent

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Venus

GPU Name

Neptune

Venus XT (216-0846000)

GPU Variant

Neptune XT (216-0847000)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

2.8 billion

123 mm²

Die Size

212 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1 (1.2)

OpenCL

1.2

1.2.170

Vulkan

1.2

-

6.5 (5.1)

Shader Model

5.1

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