GeForce GTX 780 Rev. 2 and GeForce GTX 660 Rev. 2 - video card comparison
GeForce GTX 780 Rev. 2
GeForce GTX 660 Rev. 2
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK110B
GK104
Market segment
Desktop
Desktop
Release date
September 2013
September 2014
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin
Boost clock speed
902 MHz
1032 MHz
Core clock speed
863 MHz
980 MHz
Floating-point performance
4,156 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
7,080 million
3,540 million
Pipelines / CUDA cores
2304
960
Power consumption (TDP)
250 Watt
140 Watt
Texture fill rate
173.2
82.56
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
192 Bit
Memory clock speed
6008 MHz
6008 MHz
Memory bandwidth
288.4 GB/s
144.2 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_1)
12 (11_0)
CUDA
3.5
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126