GeForce GTX 660 and Radeon HD 7970 X2 - video card comparison
GeForce GTX 660
Radeon HD 7970 X2
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK106
New Zealand
Market segment
Desktop
Desktop
Release date
September 2012
August 2012
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
One 6-pin
3x 8-pin
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
925 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
2x 3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,540 million
4,313 million
Pipelines / CUDA cores
960
2048
Power consumption (TDP)
140 Watt
500 Watt
Texture fill rate
78.4 billion/sec
118.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
3 GB
Memory bus width
192-bit GDDR5
384 Bit
Memory clock speed
6.0 GB/s
5500 MHz
Memory bandwidth
144.2 GB/s
264.0 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x DVI, 4x mini-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
+
-
OpenCL
1.2
1.2
OpenGL
4.3
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-