GeForce GTX 660 and Radeon RX 6400 - video card comparison
Passmark - benchmark score GeForce GTX 660 vs Radeon RX 6400
GeForce GTX 660
4119
Radeon RX 6400
7776
GeForce GTX 660
Radeon RX 6400
Architecture
Kepler (2012−2018)
RDNA 2.0 (2020−2022)
GPU code name
GK106
Navi 24
Market segment
Desktop
Desktop
Release date
September 2012
January 2022
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x4
Supplementary power connectors
One 6-pin
None
SLI options
+
-
Boost clock speed
1033 MHz
2321 MHz
Core clock speed
980 MHz
-
CUDA cores
960
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
6 nm
Number of transistors
2,540 million
5,400 million
Pipelines / CUDA cores
960
768
Power consumption (TDP)
140 Watt
53 Watt
Texture fill rate
78.4 billion/sec
111.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
4 GB
Memory bus width
192-bit GDDR5
64 Bit
Memory clock speed
6.0 GB/s
16 GB/s
Memory bandwidth
144.2 GB/s
128.0 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x HDMI 2.1, 1x DisplayPort 1.4a
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
+
-
OpenCL
1.2
2.2
OpenGL
4.3
4.6
Shader Model
5.1
6.6
Vulkan
1.1.126
1.3
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-