Radeon RX 6400 and Radeon RX 640 OEM - video card comparison
Radeon RX 6400
Radeon RX 640 OEM
Architecture
RDNA 2.0 (2020−2022)
GCN 4.0 (2016−2020)
GPU code name
Navi 24
Polaris 23
Market segment
Desktop
Desktop
Release date
January 2022
April 2020
Interface
PCIe 4.0 x4
PCIe 3.0 x8
Supplementary power connectors
None
None
Boost clock speed
2321 MHz
-
Core clock speed
-
1295 MHz
Manufacturing process technology
6 nm
14 nm
Number of transistors
5,400 million
2,200 million
Pipelines / CUDA cores
768
640
Power consumption (TDP)
53 Watt
50 Watt
Texture fill rate
111.4
51.80
Memory type
GDDR6
GDDR5
Maximum RAM amount
4 GB
4 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
16 GB/s
6 GB/s
Memory bandwidth
128.0 GB/s
96 GB/s
Display Connectors
1x HDMI 2.1, 1x DisplayPort 1.4a
1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a
HDMI
+
-
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenCL
2.2
2.1
OpenGL
4.6
4.6
Shader Model
6.6
6.7 (6.4)
Vulkan
1.3
1.3