GeForce GT 635M and GeForce GTX 660 Rev. 2 - video card comparison
GeForce GT 635M
GeForce GTX 660 Rev. 2
Architecture
Fermi (2010−2014)
Kepler (2012−2018)
GPU code name
N13E-GE2
GK104
Market segment
Laptop
Desktop
Release date
December 2011
September 2014
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
-
1x 6-pin
Boost clock speed
753 MHz
1032 MHz
Core clock speed
Up to 675 MHz
980 MHz
CUDA cores
Up to 144
-
Floating-point performance
253.4 gflops
1,981 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,170 million
3,540 million
Pipelines / CUDA cores
144
960
Power consumption (TDP)
35 Watt
140 Watt
Texture fill rate
Up to 16.2 billion/sec
82.56
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
Up to 192bit
192 Bit
Memory clock speed
1800 MHz
6008 MHz
Memory bandwidth
Up to 43.2 GB/s
144.2 GB/s
Shared memory
-
-
Display Connectors
No outputs
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_0)
CUDA
+
3.0
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
N/A
1.1.126
3D Blu-Ray
+
-
Optimus
+
-