Radeon HD 7850 and Radeon HD 7970 X2 - video card comparison

Radeon HD 7850

Radeon HD 7970 X2

Architecture

GCN 1.0 (2012−2020)

GCN 1.0 (2012−2020)

GPU code name

Pitcairn

New Zealand

Market segment

Desktop

Desktop

Release date

March 2012

August 2012

Bus support

PCIe 2.1 x16

-

Interface

PCIe 3.0 x16

PCIe 3.0 x16

Supplementary power connectors

1x 6-pin

3x 8-pin

Boost clock speed

1000 MHz

-

Core clock speed

-

925 MHz

Floating-point performance

1,761 gflops

2x 3,789 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

2,800 million

4,313 million

Pipelines / CUDA cores

1024

2048

Power consumption (TDP)

130 Watt

500 Watt

Texture fill rate

55.04

118.4

Memory type

GDDR5

GDDR5

Maximum RAM amount

2 GB

3 GB

Memory bus width

256 Bit

384 Bit

Memory clock speed

1200 MHz

5500 MHz

Memory bandwidth

153.6 GB/s

264.0 GB/s

Display Connectors

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

1x DVI, 4x mini-DisplayPort

Eyefinity

1

-

HDMI

+

-

DisplayPort support

-

-

DirectX

12

12 (11_1)

Mantle

-

-

OpenCL

1.2

1.2

OpenGL

4.6

4.6

Shader Model

5.1

5.1

Vulkan

+

1.2.131

AppAcceleration

-

-

CrossFire

1

-

Enduro

-

-

FreeSync

1

-

HD3D

-

-

PowerTune

-

-

TrueAudio

-

-

ZeroCore

-

-