Quadro P400 and GeForce GT 640 OEM - video card comparison
Quadro P400
GeForce GT 640 OEM
Architecture
Pascal (2016−2021)
Kepler (2012−2018)
GPU code name
GP107
GK107
Market segment
Workstation
Desktop
Release date
February 2017
April 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
1252 MHz
-
Core clock speed
1228 MHz
797 MHz
Floating-point performance
679.9 gflops
612.1 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
3,300 million
1,270 million
Pipelines / CUDA cores
256
384
Power consumption (TDP)
30 Watt
50 Watt
Texture fill rate
20.03
25.50
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
4008 MHz
1782 MHz
Memory bandwidth
32.06 GB/s
28.51 GB/s
Display Connectors
3x mini-DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
12 (12_1)
12 (11_0)
CUDA
6.1
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.2.131
1.1.126