Radeon R9 M290X and Radeon HD 6990M - video card comparison

Radeon R9 M290X

Radeon HD 6990M

Architecture

GCN (2011−2017)

Terascale 2 (2009−2015)

GPU code name

Neptune

Blackcomb XTX

Market segment

Laptop

Laptop

Release date

January 2014

July 2011

Bus support

PCIe 3.0 x16

-

Interface

PCIe 3.0 x16

MXM-B (3.0)

Supplementary power connectors

None

None

Boost clock speed

900 MHz

-

Compute units

20

-

Core clock speed

850 MHz

715 MHz

Floating-point performance

2,304 gflops

1,601.6 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

2,800 million

1,700 million

Pipelines / CUDA cores

1280

1120

Power consumption (TDP)

100 Watt

100 Watt

Texture fill rate

72.00

40.04

Memory type

GDDR5

GDDR5

Maximum RAM amount

4 GB

2 GB

Memory bus width

256 Bit

256 Bit

Memory clock speed

1200 MHz

900 MHz

Memory bandwidth

153.6 GB/s

115.2 GB/s

Shared memory

-

-

Display Connectors

No outputs

No outputs

Eyefinity

1

-

DirectX

DirectX® 11

11.2 (11_0)

Mantle

+

-

OpenCL

Not Listed

1.2

OpenGL

4.4

4.4

Shader Model

5.1

5.0

Vulkan

-

N/A

AppAcceleration

-

-

DualGraphics

1

-

Enduro

-

-

FreeSync

1

-

HD3D

+

-

PowerTune

+

-

Switchable graphics

1

-

TrueAudio

-

-

ZeroCore

+

-