Radeon RX 550 and GeForce GT 640 Rev. 2 - video card comparison
Radeon RX 550
GeForce GT 640 Rev. 2
Architecture
GCN 4.0 (2016−2020)
Kepler 2.0 (2013−2015)
GPU code name
Lexa
GK208
Market segment
Desktop
Desktop
Release date
April 2017
May 2013
Interface
PCIe 3.0 x8
PCIe 2.0 x8
Supplementary power connectors
None
None
Boost clock speed
1183 MHz
-
Core clock speed
1100 MHz
1046 MHz
Floating-point performance
1,211 gflops
803.3 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
2,200 million
915 million
Pipelines / CUDA cores
512
384
Power consumption (TDP)
50 Watt
49 Watt
Texture fill rate
37.86
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
7000 MHz
5008 MHz
Memory bandwidth
112.0 GB/s
40.06 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x VGA
HDMI
+
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.5
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
1.1.126