Radeon R9 M390 and GeForce GTX 675MX - video card comparison
Radeon R9 M390
GeForce GTX 675MX
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Pitcairn
N13E-GSR
Market segment
Laptop
Laptop
Release date
June 2015
October 2012
Bus support
PCIe 3.0
PCI Express 2.0
Interface
-
MXM-B (3.0)
Supplementary power connectors
-
None
SLI options
-
+
Core clock speed
-
600 MHz
CUDA cores
-
960
Floating-point performance
-
1,256 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5000 Million
3,540 million
Pipelines / CUDA cores
1024
960
Power consumption (TDP)
-
100 Watt
Texture fill rate
-
48.0 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
-
1800 MHz
Memory bandwidth
-
115.2 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
Eyefinity
1
-
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
DirectX® 12
12 API
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
1.1
OpenGL
4.4
4.5
Shader Model
-
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-