GeForce GT 640 Rev. 2 and GeForce GTX 750 GM206 - video card comparison
GeForce GT 640 Rev. 2
GeForce GTX 750 GM206
Architecture
Kepler 2.0 (2013−2015)
Maxwell 2.0 (2015−2019)
GPU code name
GK208
GM206
Market segment
Desktop
Desktop
Release date
May 2013
November 2015
Interface
PCIe 2.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
-
Boost clock speed
-
1239 MHz
Core clock speed
1046 MHz
-
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
915 million
2,940 million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
49 Watt
-
Texture fill rate
33.47
39.65
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5008 MHz
5012 MHz
Memory bandwidth
40.06 GB/s
80.19 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
2x DVI, 1x HDMI
HDMI
+
+
DirectX
12 (11_0)
12 (12_1)
CUDA
3.5
5.2
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.1.126