Radeon R9 285 and GeForce GTX 660 OEM - video card comparison
Radeon R9 285
GeForce GTX 660 OEM
Architecture
GCN 3.0 (2014−2017)
Kepler (2012−2018)
GPU code name
Tonga
GK104
Market segment
Desktop
Desktop
Release date
September 2014
August 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
Boost clock speed
-
888 MHz
Core clock speed
918 MHz
823 MHz
Floating-point performance
3,290 gflops
2,046 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
3,540 million
Pipelines / CUDA cores
1792
1152
Power consumption (TDP)
190 Watt
130 Watt
Texture fill rate
102.8
85.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
5.5 GB/s
5600 MHz
Memory bandwidth
176.0 GB/s
179.2 GB/s
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.0
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.5
5.1
Vulkan
1.2.170
1.1.126