GeForce RTX 3090 and GeForce GTX 660 OEM - video card comparison
GeForce RTX 3090
GeForce GTX 660 OEM
Architecture
Ampere (2020−2022)
Kepler (2012−2018)
GPU code name
Ampere GA102
GK104
Market segment
Desktop
Desktop
Release date
September 2020
August 2012
Interface
PCIe 4.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 12-pin
1x 6-pin
Boost clock speed
1700 MHz
888 MHz
Core clock speed
1400 MHz
823 MHz
Floating-point performance
-
2,046 gflops
Manufacturing process technology
8 nm
28 nm
Number of transistors
28,300 million
3,540 million
Pipelines / CUDA cores
10496
1152
Power consumption (TDP)
350 Watt
130 Watt
Texture fill rate
556.0
85.25
Memory type
GDDR6X
GDDR5
Maximum RAM amount
24 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
19500 MHz
5600 MHz
Memory bandwidth
936.2 GB/s
179.2 GB/s
Shared memory
-
-
Display Connectors
1x HDMI, 3x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 Ultimate (12_2)
12 (11_0)
CUDA
8.5
3.0
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.5
5.1
Vulkan
1.2
1.1.126