GeForce GTX 660 OEM and Radeon 540 - video card comparison
GeForce GTX 660 OEM
Radeon 540
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK104
Lexa
Market segment
Desktop
Desktop
Release date
August 2012
April 2017
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin
None
Boost clock speed
888 MHz
1124 MHz
Core clock speed
823 MHz
1183 MHz
Floating-point performance
2,046 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
3,540 million
2,200 million
Pipelines / CUDA cores
1152
384
Power consumption (TDP)
130 Watt
50 Watt
Texture fill rate
85.25
28.39
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
32 Bit
Memory clock speed
5600 MHz
6 GB/s
Memory bandwidth
179.2 GB/s
24 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DisplayPort 1.4a
HDMI
+
-
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.7
Vulkan
1.1.126
1.3