Radeon HD 7970 and HD Graphics 400 - video card comparison

Radeon HD 7970

HD Graphics 400

Architecture

GCN (2011−2017)

Generation 8.0 (2014−2015)

GPU code name

Tahiti XT

Braswell GT1

Market segment

Desktop

Desktop

Release date

December 2011

April 2015

Bus support

PCIe 2.1 x16

-

Interface

PCIe 3.0 x16

PCIe 3.0 x1

Supplementary power connectors

1x 6-pin + 1x 8-pin

-

Boost clock speed

925 MHz

640 MHz

Core clock speed

-

320 MHz

Floating-point performance

3,789 gflops

134.4 gflops

Manufacturing process technology

28 nm

14 nm

Number of transistors

4,313 million

189 million

Pipelines / CUDA cores

2048

96

Power consumption (TDP)

300 Watt

6 Watt

Texture fill rate

118.4

7.680

Memory type

GDDR5

DDR3L

Maximum RAM amount

6 GB

8 GB

Memory bus width

384 Bit

System Shared

Memory clock speed

1375 MHz

System Shared

Memory bandwidth

264 GB/s

-

Shared memory

-

-

Display Connectors

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

No outputs

Eyefinity

+

-

HDMI

+

-

DisplayPort support

-

-

DirectX

DirectX® 11

12 (11_1)

Mantle

-

-

OpenCL

1.2

2.0

OpenGL

4.6

4.3

Shader Model

5.1

5.1

Vulkan

-

1.1.80

AppAcceleration

-

-

CrossFire

1

-

Enduro

-

-

FreeSync

1

-

HD3D

-

-

PowerTune

-

-

TrueAudio

-

-

ZeroCore

-

-