GeForce GTX 660 and Radeon HD 6970 - video card comparison
Passmark - benchmark score GeForce GTX 660 vs Radeon HD 6970
GeForce GTX 660
4119
Radeon HD 6970
2921
GeForce GTX 660
Radeon HD 6970
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
GK106
Cayman
Market segment
Desktop
Desktop
Release date
September 2012
December 2010
Bus support
PCI Express 3.0
PCIe 2.0 x16
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
One 6-pin
1x 6-pin + 1x 8-pin
SLI options
+
-
Boost clock speed
1033 MHz
880 MHz
Core clock speed
980 MHz
-
CUDA cores
960
-
Floating-point performance
1,981 gflops
2,703.4 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,540 million
2,640 million
Pipelines / CUDA cores
960
1536
Power consumption (TDP)
140 Watt
550 Watt
Texture fill rate
78.4 billion/sec
84.48
Memory type
GDDR5
DDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
1375 MHz
Memory bandwidth
144.2 GB/s
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Multi monitor support
4 displays
-
Eyefinity
-
1
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
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
-
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-