Radeon HD 7850 and Radeon R9 255 OEM - video card comparison

Radeon HD 7850

Radeon R9 255 OEM

Architecture

GCN 1.0 (2012−2020)

GCN 1.0 (2012−2020)

GPU code name

Pitcairn

Cape Verde

Market segment

Desktop

Desktop

Release date

March 2012

December 2013

Bus support

PCIe 2.1 x16

-

Interface

PCIe 3.0 x16

PCIe 3.0 x16

Supplementary power connectors

1x 6-pin

1x 6-pin

Boost clock speed

1000 MHz

930 MHz

Core clock speed

-

900 MHz

Floating-point performance

1,761 gflops

952.3 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

2,800 million

1,500 million

Pipelines / CUDA cores

1024

512

Power consumption (TDP)

130 Watt

65 Watt

Texture fill rate

55.04

29.76

Memory type

GDDR5

GDDR5

Maximum RAM amount

2 GB

2 GB

Memory bus width

256 Bit

128 Bit

Memory clock speed

1200 MHz

4600 MHz

Memory bandwidth

153.6 GB/s

73.6 GB/s

Display Connectors

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

No outputs

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

-

-