GeForce GTX 680M and GeForce GTX 660M - video card comparison
Passmark - benchmark score GeForce GTX 680M vs GeForce GTX 660M
GeForce GTX 680M
3312
GeForce GTX 660M
1478
GeForce GTX 680M
GeForce GTX 660M
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
N13E-GTX
N13E-GE
Market segment
Laptop
Laptop
Release date
June 2012
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
MXM-B (3.0)
MXM-B (3.0)
Supplementary power connectors
None
-
SLI options
+
+
Boost clock speed
758 MHz
950 MHz
Core clock speed
720 MHz
835 MHz
CUDA cores
1344
384
Floating-point performance
2,038 gflops
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
1,270 million
Pipelines / CUDA cores
1344
384
Power consumption (TDP)
100 Watt
50 Watt
Texture fill rate
80.6 billion/sec
30.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
1800 MHz
2000 MHz
Memory bandwidth
115.2 GB/s
64.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
12 API
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
Optimus
+
+