GeForce GTX 660 and GeForce 405M - video card comparison
GeForce GTX 660
GeForce 405M
Architecture
Kepler (2012−2018)
GT2xx (2009−2012)
GPU code name
GK106
GT218
Market segment
Desktop
Laptop
Release date
September 2012
May 2012
Bus support
PCI Express 3.0
PCI-E 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
One 6-pin
-
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
606 MHz
CUDA cores
960
16
Floating-point performance
1,981 gflops
38.78 gflops
Gigaflops
-
73
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,540 million
260 million
Pipelines / CUDA cores
960
16
Power consumption (TDP)
140 Watt
14 Watt
Texture fill rate
78.4 billion/sec
4.848
Memory type
GDDR5
GDDR3, DDR3
Maximum RAM amount
2 GB
Up to 512 MB
Memory bus width
192-bit GDDR5
64 Bit
Memory clock speed
6.0 GB/s
Up to 800 (DDR3), Up to 800 (GDDR3) MHz
Memory bandwidth
144.2 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
DisplayPort, HDMI, VGA, Dual Link DVI, Single Link DVI
Multi monitor support
4 displays
+
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
2048x1536
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.3
4.5
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-
Power management
-
8.0