Radeon R9 M390 and Radeon R9 M290X Mac Edition - video card comparison
Radeon R9 M390
Radeon R9 M290X Mac Edition
Architecture
GCN (2011−2017)
GCN 1.0 (2012−2020)
GPU code name
Pitcairn
Pitcairn
Market segment
Laptop
Desktop
Release date
June 2015
November 2014
Bus support
PCIe 3.0
-
Interface
-
PCIe 3.0 x16
Supplementary power connectors
-
None
Boost clock speed
-
975 MHz
Manufacturing process technology
28 nm
28 nm
Number of transistors
5000 Million
2,800 million
Pipelines / CUDA cores
1024
1024
Power consumption (TDP)
-
80 Watt
Texture fill rate
-
62.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
5.5 GB/s
Memory bandwidth
-
174.7 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
Eyefinity
1
-
DirectX
DirectX® 12
12 (11_1)
Mantle
+
-
OpenCL
Not Listed
1.2
OpenGL
4.4
4.6
Shader Model
-
5.1
Vulkan
-
1.2
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-