Radeon HD 7970 and Radeon E8950 - video card comparison

Radeon HD 7970

Radeon E8950

Architecture

GCN (2011−2017)

GCN 3.0 (2014−2017)

GPU code name

Tahiti XT

Amethyst

Market segment

Desktop

Desktop

Release date

December 2011

September 2015

Bus support

PCIe 2.1 x16

-

Interface

PCIe 3.0 x16

MXM-B (3.0)

Supplementary power connectors

1x 6-pin + 1x 8-pin

None

Boost clock speed

925 MHz

1000 MHz

Core clock speed

-

735 MHz

Floating-point performance

3,789 gflops

4,096 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

4,313 million

5,000 million

Pipelines / CUDA cores

2048

2048

Power consumption (TDP)

300 Watt

95 Watt

Texture fill rate

118.4

128.0

Memory type

GDDR5

GDDR5

Maximum RAM amount

6 GB

8 GB

Memory bus width

384 Bit

256 Bit

Memory clock speed

1375 MHz

6000 MHz

Memory bandwidth

264 GB/s

192.0 GB/s

Shared memory

-

-

Display Connectors

1x DVI, 1x HDMI, 2x mini-DisplayPort

No outputs

Eyefinity

+

-

HDMI

+

-

DisplayPort support

-

-

DirectX

DirectX® 11

12 (12_0)

Mantle

-

-

OpenCL

1.2

2.0

OpenGL

4.6

4.6

Shader Model

5.1

6.3

Vulkan

-

1.2.131

AppAcceleration

-

-

CrossFire

1

-

Enduro

-

-

FreeSync

1

-

HD3D

-

-

PowerTune

-

-

TrueAudio

-

-

ZeroCore

-

-