GeForce GTX 680M and Radeon R9 M390 - video card comparison
GeForce GTX 680M
Radeon R9 M390
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
N13E-GTX
Pitcairn
Market segment
Laptop
Laptop
Release date
June 2012
June 2015
Bus support
PCI Express 3.0
PCIe 3.0
Interface
MXM-B (3.0)
-
Supplementary power connectors
None
-
SLI options
+
-
Boost clock speed
758 MHz
-
Core clock speed
720 MHz
-
CUDA cores
1344
-
Floating-point performance
2,038 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
5000 Million
Pipelines / CUDA cores
1344
1024
Power consumption (TDP)
100 Watt
-
Texture fill rate
80.6 billion/sec
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 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
DirectX
12 API
DirectX® 12
CUDA
+
-
Mantle
-
+
OpenCL
1.1
Not Listed
OpenGL
4.5
4.4
Shader Model
5.1
-
Vulkan
1.1.126
-
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
+
Optimus
+
-
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+