GeForce GTX 680M and GeForce GT 755M SLI - video card comparison
GeForce GTX 680M
GeForce GT 755M SLI
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
N13E-GTX
N14P-?
Market segment
Laptop
Laptop
Release date
June 2012
November 2013
Bus support
PCI Express 3.0
-
Interface
MXM-B (3.0)
-
Supplementary power connectors
None
-
SLI options
+
-
Boost clock speed
758 MHz
-
Core clock speed
720 MHz
980 MHz
CUDA cores
1344
-
Floating-point performance
2,038 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
2x 1300 Million
Pipelines / CUDA cores
1344
768
Power consumption (TDP)
100 Watt
2x ~50 Watt
Texture fill rate
80.6 billion/sec
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2x 2 GB
Memory bus width
256 Bit
2x 128 Bit
Memory clock speed
1800 MHz
5400 MHz
Memory bandwidth
115.2 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
DirectX
12 API
11
CUDA
+
+
OpenCL
1.1
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
Optimus
+
-