GeForce GTX 660 OEM and Radeon X700 - video card comparison
GeForce GTX 660 OEM
Radeon X700
Architecture
Kepler (2012−2018)
R400 (2004−2008)
GPU code name
GK104
RV410
Market segment
Desktop
Desktop
Release date
August 2012
September 2004
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
1x 6-pin
None
Boost clock speed
888 MHz
-
Core clock speed
823 MHz
400 MHz
Floating-point performance
2,046 gflops
-
Manufacturing process technology
28 nm
110 nm
Number of transistors
3,540 million
120 million
Pipelines / CUDA cores
1152
-
Power consumption (TDP)
130 Watt
44 Watt
Texture fill rate
85.25
3.200
Memory type
GDDR5
DDR
Maximum RAM amount
2 GB
128 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5600 MHz
500 MHz
Memory bandwidth
179.2 GB/s
8 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
9.0b (9_2)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
-
Vulkan
1.1.126
N/A