GeForce GTX 660 and Radeon HD 6950M - video card comparison
GeForce GTX 660
Radeon HD 6950M
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
GK106
Blackcomb Pro
Market segment
Desktop
Laptop
Release date
September 2012
January 2011
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
One 6-pin
-
SLI options
+
-
Boost clock speed
1033 MHz
-
Core clock speed
980 MHz
580 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
1,113.6 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,540 million
1,700 million
Pipelines / CUDA cores
960
960
Power consumption (TDP)
140 Watt
50 Watt
Texture fill rate
78.4 billion/sec
27.84
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
900 MHz
Memory bandwidth
144.2 GB/s
115.2 GB/s
Shared memory
-
-
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)
11.2 (11_0)
CUDA
+
-
OpenCL
1.2
1.2
OpenGL
4.3
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-