Radeon RX 640 and Radeon 540 Mobile - video card comparison
Radeon RX 640
Radeon 540 Mobile
Architecture
Polaris (2016−2019)
GCN 4.0 (2016−2020)
GPU code name
Polaris 12
Lexa
Market segment
Laptop
Laptop
Release date
August 2019
March 2019
Interface
PCIe 3.0 x8
PCIe 3.0 x8
Supplementary power connectors
None
-
Boost clock speed
1218 MHz
1124 MHz
Core clock speed
1218 MHz
-
Manufacturing process technology
14 nm
14 nm
Number of transistors
2,200 million
2,200 million
Pipelines / CUDA cores
640
512
Power consumption (TDP)
50 Watt
50 Watt
Texture fill rate
38.98
35.97
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
6000 MHz
6000 MHz
Memory bandwidth
112.0 GB/s
48 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (12_0)
12 (12_0)
OpenCL
2.0
2.0
OpenGL
4.6
4.6
Shader Model
6.4
6.4
Vulkan
1.2.131
1.2.131
FreeSync
+
-