GeForce GT 640 and GeForce GTX 950 OEM - video card comparison
GeForce GT 640
GeForce GTX 950 OEM
Architecture
Kepler (2012−2018)
Maxwell 2.0 (2015−2019)
GPU code name
GK107
GM206S
Market segment
Desktop
Desktop
Release date
June 2012
2016
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
-
1203 MHz
Core clock speed
902 MHz
937 MHz
Floating-point performance
692.7 gflops
1,946 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
2,940 million
Pipelines / CUDA cores
384
1024
Power consumption (TDP)
65 Watt
-
Texture fill rate
28.86
76.99
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
5 GB/s
Memory bandwidth
28.51 GB/s
80.19 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (12_1)
CUDA
3.0
5.2
OpenCL
1.2
3.0
OpenGL
4.6
4.6
Shader Model
5.1
6.7
Vulkan
1.1.126
1.3