Radeon R5 A255 and Radeon RX 6600 XT - video card comparison

Radeon R5 A255

Radeon RX 6600 XT

Architecture

GCN 3.0 (2014−2017)

Navi / RDNA2 (2020−2022)

GPU code name

Topaz

Navi 23

Market segment

Desktop

Release date

2014

July 2021

Interface

PCIe 3.0 x8

PCIe 4.0 x8

Supplementary power connectors

1x 8-pin

Boost clock speed

940 MHz

2589 MHz

Core clock speed

925 MHz

1968 MHz

Manufacturing process technology

28 nm

7 nm

Number of transistors

1,550 million

11,060 million

Pipelines / CUDA cores

384

2048

Power consumption (TDP)

160 (TGP) Watt

Texture fill rate

22.56

331.4

Memory type

GDDR5

GDDR6

Maximum RAM amount

1 GB

8 GB

Memory bus width

128 Bit

Memory clock speed

4 GB/s

16000 MHz

Memory bandwidth

64 GB/s

256.0 GB/s

Shared memory

Display Connectors

Portable Device Dependent

1x HDMI, 2x DisplayPort

HDMI

DirectX

12 (12_0)

12.0 Ultimate (12_2)

OpenCL

2.1

OpenGL

4.6

Shader Model

6.5

Vulkan

1.2.170

1.2