GeForce GTX 660 and GeForce RTX 3080 Mobile - video card comparison
GeForce GTX 660
GeForce RTX 3080 Mobile
Architecture
Kepler (2012−2018)
Ampere (2020−2022)
GPU code name
GK106
GN20-E7 GA104
Market segment
Desktop
Laptop
Release date
September 2012
January 2021
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x16
Supplementary power connectors
One 6-pin
-
SLI options
+
-
Boost clock speed
1033 MHz
1245 - 1710 MHz
Core clock speed
980 MHz
780 - 1100 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
8 nm
Number of transistors
2,540 million
17,400 million
Pipelines / CUDA cores
960
6144
Power consumption (TDP)
140 Watt
150 Watt (80 - 150 Watt TGP)
Texture fill rate
78.4 billion/sec
296.6
Memory type
GDDR5
GDDR6
Maximum RAM amount
2 GB
16 GB
Memory bus width
192-bit GDDR5
256 Bit
Memory clock speed
6.0 GB/s
14000 MHz
Memory bandwidth
144.2 GB/s
384.0 GB/s
Shared memory
-
-
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
No outputs
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
+
8.6
OpenCL
1.2
2.0
OpenGL
4.3
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-