Radeon Sky 900 and Radeon RX 6400 - video card comparison

Radeon Sky 900

Radeon RX 6400

Architecture

GCN 1.0 (2012−2020)

RDNA 2.0 (2020−2022)

GPU code name

Tahiti

Navi 24

Market segment

Desktop

Desktop

Release date

March 2013

January 2022

Bus support

PCIe 3.0

-

Interface

PCIe 3.0 x16

PCIe 4.0 x4

Supplementary power connectors

2x 8-pin

None

Boost clock speed

950 MHz

2321 MHz

Core clock speed

825 MHz

-

Floating-point performance

2x 3,405 gflops

-

Manufacturing process technology

28 nm

6 nm

Number of transistors

4,313 million

5,400 million

Pipelines / CUDA cores

3584

768

Power consumption (TDP)

300 Watt

53 Watt

Texture fill rate

106.4

111.4

Memory type

GDDR5

GDDR6

Maximum RAM amount

6 GB

4 GB

Memory bus width

384 Bit

64 Bit

Memory clock speed

5000 MHz

16 GB/s

Memory bandwidth

480 GB/s

128.0 GB/s

Display Connectors

1x DVI, 1x mini-DisplayPort

1x HDMI 2.1, 1x DisplayPort 1.4a

Dual-link DVI support

1

-

HDMI

-

+

DirectX

12 (11_1)

12 Ultimate (12_2)

OpenCL

1.2

2.2

OpenGL

4.6

4.6

Shader Model

5.1

6.6

Vulkan

1.2.131

1.3