Radeon R9 M290X and Radeon R9 M390 - video card comparison
Radeon R9 M290X
Radeon R9 M390
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Neptune
Pitcairn
Market segment
Laptop
Laptop
Release date
January 2014
June 2015
Bus support
PCIe 3.0 x16
PCIe 3.0
Interface
PCIe 3.0 x16
-
Supplementary power connectors
None
-
Boost clock speed
900 MHz
-
Compute units
20
-
Core clock speed
850 MHz
-
Floating-point performance
2,304 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
5000 Million
Pipelines / CUDA cores
1280
1024
Power consumption (TDP)
100 Watt
-
Texture fill rate
72.00
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1200 MHz
-
Memory bandwidth
153.6 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
Eyefinity
1
1
DirectX
DirectX® 11
DirectX® 12
Mantle
+
+
OpenCL
Not Listed
Not Listed
OpenGL
4.4
4.4
Shader Model
5.1
-
AppAcceleration
-
-
DualGraphics
1
1
Enduro
-
-
FreeSync
1
1
HD3D
+
+
PowerTune
+
+
Switchable graphics
1
1
TrueAudio
-
-
ZeroCore
+
+