GeForce GTX 660 OEM and Radeon Sky 900 - video card comparison
GeForce GTX 660 OEM
Radeon Sky 900
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK104
Tahiti
Market segment
Desktop
Desktop
Release date
August 2012
March 2013
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
2x 8-pin
Boost clock speed
888 MHz
950 MHz
Core clock speed
823 MHz
825 MHz
Floating-point performance
2,046 gflops
2x 3,405 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
4,313 million
Pipelines / CUDA cores
1152
3584
Power consumption (TDP)
130 Watt
300 Watt
Texture fill rate
85.25
106.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
6 GB
Memory bus width
256 Bit
384 Bit
Memory clock speed
5600 MHz
5000 MHz
Memory bandwidth
179.2 GB/s
480 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x mini-DisplayPort
Dual-link DVI support
-
1
HDMI
+
-
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131