GeForce GT 640 and GeForce RTX 3080 - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce RTX 3080
GeForce GT 640
1209
GeForce RTX 3080
26041
GeForce GT 640
GeForce RTX 3080
Architecture
Kepler (2012−2018)
Ampere (2020−2022)
GPU code name
GK107
Ampere GA102
Market segment
Desktop
Desktop
Release date
June 2012
September 2020
Interface
PCIe 3.0 x16
PCIe 4.0 x16
Supplementary power connectors
None
1x 12-pin
Boost clock speed
-
1710 MHz
Core clock speed
902 MHz
1450 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
8 nm
Number of transistors
1,270 million
28,300 million
Pipelines / CUDA cores
384
8704
Power consumption (TDP)
65 Watt
320 Watt
Texture fill rate
28.86
465.1
Memory type
DDR3
GDDR6X
Maximum RAM amount
2 GB
10 GB
Memory bus width
128 Bit
320 Bit
Memory clock speed
1782 MHz
19000 MHz
Memory bandwidth
28.51 GB/s
760.3 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
3.0
8.5
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.2