Radeon RX 580 and Radeon R9 255 OEM - video card comparison

Radeon RX 580

Radeon R9 255 OEM

Architecture

Polaris (2016−2019)

GCN 1.0 (2012−2020)

GPU code name

Polaris 20

Cape Verde

Market segment

Desktop

Release date

April 2017

December 2013

Interface

PCIe 3.0 x16

Supplementary power connectors

1x 8-pin

1x 6-pin

Boost clock speed

1340 MHz

930 MHz

Core clock speed

1257 MHz

900 MHz

Floating-point performance

6,175 gflops

952.3 gflops

Manufacturing process technology

14 nm

28 nm

Number of transistors

5,700 million

1,500 million

Pipelines / CUDA cores

2304

512

Power consumption (TDP)

185 Watt

65 Watt

Texture fill rate

193.0

29.76

Memory type

GDDR5

Maximum RAM amount

8 GB

2 GB

Memory bus width

256 Bit

128 Bit

Memory clock speed

8000 MHz

4600 MHz

Memory bandwidth

256.0 GB/s

73.6 GB/s

Display Connectors

1x HDMI, 3x DisplayPort

No outputs

HDMI

DirectX

12 (12_0)

12 (11_1)

OpenCL

2.0

1.2

OpenGL

4.6

Shader Model

6.4

5.1

Vulkan

1.2.131