GeForce GTX 660 Rev. 2 and Radeon RX 6600 - video card comparison
GeForce GTX 660 Rev. 2
Radeon RX 6600
Architecture
Kepler (2012−2018)
Navi / RDNA2 (2020−2022)
GPU code name
GK104
Navi 23
Market segment
Desktop
Desktop
Release date
September 2014
October 2021
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
1x 6-pin
1x 8-pin
Boost clock speed
1032 MHz
2491 MHz
Core clock speed
980 MHz
2044 MHz
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
3,540 million
11,060 million
Pipelines / CUDA cores
960
1792
Power consumption (TDP)
140 Watt
132 Watt
Texture fill rate
82.56
279.0
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
8 GB
Memory bus width
192 Bit
128 Bit
Memory clock speed
6008 MHz
14500 MHz
Memory bandwidth
144.2 GB/s
224.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12.0 Ultimate (12_2)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2