GeForce GTX 660 and Radeon HD 7970 GHz Edition - video card comparison
GeForce GTX 660
Radeon HD 7970 GHz Edition
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK106
Tahiti
Market segment
Desktop
Desktop
Release date
September 2012
June 2012
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
1050 MHz
Core clock speed
980 MHz
-
CUDA cores
960
-
Floating-point performance
1,981 gflops
4,301 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
250 Watt
Texture fill rate
78.4 billion/sec
134.4
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
1500 MHz
Memory bandwidth
144.2 GB/s
288 GB/s
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
-
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
4.6
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
-
-