Radeon Pro 555X and Radeon R9 M390 Mac Edition - video card comparison
Radeon Pro 555X
Radeon R9 M390 Mac Edition
Architecture
Polaris (2016−2019)
GCN 1.0 (2012−2020)
GPU code name
Polaris 21
Pitcairn
Market segment
Mobile workstation
Desktop
Release date
June 2017
May 2015
Interface
PCIe 3.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
None
Core clock speed
855 MHz
958 MHz
Manufacturing process technology
14 nm
28 nm
Number of transistors
3,000 million
2,800 million
Pipelines / CUDA cores
768
1024
Power consumption (TDP)
-
80 Watt
Texture fill rate
43.54
61.31
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
5080 MHz
5.5 GB/s
Memory bandwidth
81.6 GB/s
174.7 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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
FreeSync
+
-