Radeon R9 M390 and GeForce GTX 780M Mac Edition - video card comparison
Radeon R9 M390
GeForce GTX 780M Mac Edition
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Pitcairn
GK104
Market segment
Laptop
Desktop
Release date
June 2015
November 2013
Bus support
PCIe 3.0
-
Interface
-
MXM-B (3.0)
Boost clock speed
-
797 MHz
Core clock speed
-
771 MHz
Floating-point performance
-
2,448 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5000 Million
3,540 million
Pipelines / CUDA cores
1024
1536
Power consumption (TDP)
-
122 Watt
Texture fill rate
-
102.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
5000 MHz
Memory bandwidth
-
160.0 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
Eyefinity
1
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
+
-
OpenCL
Not Listed
1.2
OpenGL
4.4
4.6
Shader Model
-
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-