GeForce GTX 660 and Radeon HD 7970 - video card comparison
Passmark - benchmark score GeForce GTX 660 vs Radeon HD 7970
GeForce GTX 660
4119
Radeon HD 7970
5405
GeForce GTX 660
Radeon HD 7970
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
GK106
Tahiti XT
Market segment
Desktop
Desktop
Release date
September 2012
December 2011
Bus support
PCI Express 3.0
PCIe 2.1 x16
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
925 MHz
Core clock speed
980 MHz
-
CUDA cores
960
-
Floating-point performance
1,981 gflops
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
300 Watt
Texture fill rate
78.4 billion/sec
118.4
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
1375 MHz
Memory bandwidth
144.2 GB/s
264 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Multi monitor support
4 displays
-
Eyefinity
-
+
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
DisplayPort support
-
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
DirectX® 11
CUDA
+
-
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.3
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
-
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
FreeSync
-
1
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-