Radeon R9 M390X and GeForce GT 650M SLI - video card comparison
Radeon R9 M390X
GeForce GT 650M SLI
Architecture
GCN 3 (2014−2016)
Kepler (2012−2018)
GPU code name
Amethyst (XT) / Tonga
N13E-GE
Market segment
Laptop
Laptop
Release date
June 2015
March 2012
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
-
Supplementary power connectors
None
-
Boost clock speed
-
835 MHz
Core clock speed
723 MHz
790 MHz
Floating-point performance
2,961 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
-
Pipelines / CUDA cores
2048
768
Power consumption (TDP)
100 Watt
-
Texture fill rate
92.54
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2x2 GB
Memory bus width
256 Bit
2x 128 Bit
Memory clock speed
-
4000 MHz
Memory bandwidth
160.0 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
Eyefinity
1
-
DirectX
DirectX® 12
11
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
-
OpenGL
4.4
-
Shader Model
6.3
-
Vulkan
+
-
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-