GeForce GTX 660 OEM and Radeon 540X - video card comparison
GeForce GTX 660 OEM
Radeon 540X
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK104
Lexa
Market segment
Desktop
Laptop
Release date
August 2012
August 2019
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin
None
Boost clock speed
888 MHz
1219 MHz
Core clock speed
823 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
512
Power consumption (TDP)
130 Watt
50 Watt
Texture fill rate
85.25
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
5600 MHz
6000 MHz
Memory bandwidth
179.2 GB/s
112.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.2.131