GeForce GTX 660 Rev. 2 and Radeon RX 5900 XT - video card comparison
GeForce GTX 660 Rev. 2
Radeon RX 5900 XT
Architecture
Kepler (2012−2018)
RDNA 2.0 (2020−2022)
GPU code name
GK104
Navi 21
Market segment
Desktop
Desktop
Release date
September 2014
-
Interface
PCIe 3.0 x16
PCIe 4.0 x16
Supplementary power connectors
1x 6-pin
2x 8-pin
Boost clock speed
1032 MHz
1735 MHz
Core clock speed
980 MHz
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
3,540 million
21,000 million
Pipelines / CUDA cores
960
4352
Power consumption (TDP)
140 Watt
300 Watt
Texture fill rate
82.56
471.9
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
12 GB
Memory bus width
192 Bit
384 Bit
Memory clock speed
6008 MHz
14000 MHz
Memory bandwidth
144.2 GB/s
672.0 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 Ultimate (12_1)
CUDA
3.0
-
OpenCL
1.2
-
OpenGL
4.6
4.6
Shader Model
5.1
-
Vulkan
1.1.126
-