GeForce GTX 660 and GeForce GT 620 - video card comparison
Passmark - benchmark score GeForce GTX 660 vs GeForce GT 620
GeForce GTX 660
4119
GeForce GT 620
388
GeForce GTX 660
GeForce GT 620
Architecture
Kepler (2012−2018)
Fermi (2010−2014)
GPU code name
GK106
GF108
Market segment
Desktop
Desktop
Release date
September 2012
May 2012
Bus support
PCI Express 3.0
PCI Express 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
One 6-pin
None
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
700 MHz
CUDA cores
960
96
Floating-point performance
1,981 gflops
268.8 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,540 million
585 million
Pipelines / CUDA cores
960
96
Power consumption (TDP)
140 Watt
49 Watt
Maximum GPU temperature
-
98 °C
Texture fill rate
78.4 billion/sec
11.2 billion/sec
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
192-bit GDDR5
64 Bit
Memory clock speed
6.0 GB/s
1.8 GB/s
Memory bandwidth
144.2 GB/s
14.4 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
Dual Link DVI-I, HDMI, VGA
Multi monitor support
4 displays
+
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
2048x1536
2048x1536
Audio input for HDMI
Internal
Internal
DirectX
12 (11_0)
12 (11_0)
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.3
4.2
Shader Model
5.1
5.1
Vulkan
1.1.126
N/A
3D Blu-Ray
+
+
3D Gaming
+
-
3D Vision
+
-