Radeon RX 550 and Radeon R9 M390 Mac Edition - video card comparison
Radeon RX 550
Radeon R9 M390 Mac Edition
Architecture
GCN 4.0 (2016−2020)
GCN 1.0 (2012−2020)
GPU code name
Lexa
Pitcairn
Market segment
Desktop
Desktop
Release date
April 2017
May 2015
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
1183 MHz
-
Core clock speed
1100 MHz
958 MHz
Floating-point performance
1,211 gflops
-
Manufacturing process technology
14 nm
28 nm
Number of transistors
2,200 million
2,800 million
Pipelines / CUDA cores
512
1024
Power consumption (TDP)
50 Watt
80 Watt
Texture fill rate
37.86
61.31
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
7000 MHz
5.5 GB/s
Memory bandwidth
112.0 GB/s
174.7 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (12_0)
12 (11_1)
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
1.2