Radeon RX 550 and GeForce GT 645 OEM - video card comparison
Radeon RX 550
GeForce GT 645 OEM
Architecture
GCN 4.0 (2016−2020)
Fermi 2.0 (2010−2014)
GPU code name
Lexa
GF114
Market segment
Desktop
Desktop
Release date
April 2017
April 2012
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Supplementary power connectors
None
-
Boost clock speed
1183 MHz
-
Core clock speed
1100 MHz
776 MHz
Floating-point performance
1,211 gflops
894.0 gflops
Manufacturing process technology
14 nm
40 nm
Number of transistors
2,200 million
1,950 million
Pipelines / CUDA cores
512
288
Power consumption (TDP)
50 Watt
102 Watt
Texture fill rate
37.86
37.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
128 Bit
192 Bit
Memory clock speed
7000 MHz
3828 MHz
Memory bandwidth
112.0 GB/s
91.87 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x mini-HDMI
HDMI
+
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
2.1
OpenCL
2.0
1.1
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
N/A