Radeon RX 550 and GeForce GTX 645 OEM - video card comparison
Radeon RX 550
GeForce GTX 645 OEM
Architecture
GCN 4.0 (2016−2020)
Kepler (2012−2018)
GPU code name
Lexa
GK106
Market segment
Desktop
Desktop
Release date
April 2017
April 2013
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
1183 MHz
-
Core clock speed
1100 MHz
824 MHz
Floating-point performance
1,211 gflops
949.2 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
2,200 million
2,540 million
Pipelines / CUDA cores
512
576
Power consumption (TDP)
50 Watt
65 Watt
Texture fill rate
37.86
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
7000 MHz
4000 MHz
Memory bandwidth
112.0 GB/s
64 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.0
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
1.1.126