Radeon R9 M390 and GeForce GTX 675M SLI - video card comparison
Radeon R9 M390
GeForce GTX 675M SLI
Architecture
GCN (2011−2017)
Fermi (2010−2014)
GPU code name
Pitcairn
N12E-GTX2
Market segment
Laptop
Laptop
Release date
June 2015
January 2011
Bus support
PCIe 3.0
-
SLI options
-
+
Core clock speed
-
620 MHz
Manufacturing process technology
28 nm
40 nm
Number of transistors
5000 Million
-
Pipelines / CUDA cores
1024
768
Power consumption (TDP)
-
2x 100 Watt
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
-
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
3000 MHz
Shared memory
-
-
Eyefinity
1
-
DirectX
DirectX® 12
11
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
-
OpenGL
4.4
-
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-