Radeon RX 640 and Radeon RX 6400 - video card comparison
Passmark - benchmark score Radeon RX 640 vs Radeon RX 6400
Radeon RX 640
2020
Radeon RX 6400
7778
Radeon RX 640
Radeon RX 6400
Architecture
Polaris (2016−2019)
RDNA 2.0 (2020−2022)
GPU code name
Polaris 12
Navi 24
Market segment
Laptop
Desktop
Release date
August 2019
January 2022
Interface
PCIe 3.0 x8
PCIe 4.0 x4
Supplementary power connectors
None
None
Boost clock speed
1218 MHz
2321 MHz
Core clock speed
1218 MHz
-
Manufacturing process technology
14 nm
6 nm
Number of transistors
2,200 million
5,400 million
Pipelines / CUDA cores
640
768
Power consumption (TDP)
50 Watt
53 Watt
Texture fill rate
38.98
111.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
4 GB
4 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
6000 MHz
16 GB/s
Memory bandwidth
112.0 GB/s
128.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI
+
+
DirectX
12 (12_0)
12 Ultimate (12_2)
OpenCL
2.0
2.2
OpenGL
4.6
4.6
Shader Model
6.4
6.6
Vulkan
1.2.131
1.3
FreeSync
+
-