GeForce GTX 660 and GeForce GTX 780 6 GB - video card comparison
GeForce GTX 660
GeForce GTX 780 6 GB
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK106
GK110B
Market segment
Desktop
Desktop
Release date
September 2012
September 2013
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
One 6-pin
1x 6-pin + 1x 8-pin
SLI options
+
-
Boost clock speed
1033 MHz
902 MHz
Core clock speed
980 MHz
863 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
4,156 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,540 million
7,080 million
Pipelines / CUDA cores
960
2304
Power consumption (TDP)
140 Watt
250 Watt
Texture fill rate
78.4 billion/sec
173.2
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
6 GB
Memory bus width
192-bit GDDR5
384 Bit
Memory clock speed
6.0 GB/s
6008 MHz
Memory bandwidth
144.2 GB/s
288.4 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (11_1)
CUDA
+
3.5
OpenCL
1.2
1.2
OpenGL
4.3
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-