GeForce GTX 660 and Radeon R7 Graphics - video card comparison
GeForce GTX 660
Radeon R7 Graphics
Architecture
Kepler (2012−2018)
GCN 2.0 (2013−2017)
GPU code name
GK106
Spectre
Market segment
Desktop
Desktop
Release date
September 2012
January 2014
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
IGP
Supplementary power connectors
One 6-pin
-
SLI options
+
-
Boost clock speed
1033 MHz
980 MHz
Core clock speed
980 MHz
686 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
526.8 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,540 million
2,410 million
Pipelines / CUDA cores
960
512
Power consumption (TDP)
140 Watt
15 Watt
Texture fill rate
78.4 billion/sec
31.36
Memory type
GDDR5
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
192-bit GDDR5
System Shared
Memory clock speed
6.0 GB/s
System Shared
Memory bandwidth
144.2 GB/s
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
No outputs
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (12_0)
CUDA
+
-
OpenCL
1.2
2.0
OpenGL
4.3
4.6
Shader Model
5.1
6.0
Vulkan
1.1.126
1.2.131
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-