GeForce 920M and GeForce GT 640 Rev. 2 - video card comparison
GeForce 920M
GeForce GT 640 Rev. 2
Architecture
Kepler (2012−2018)
Kepler 2.0 (2013−2015)
GPU code name
N16V-GM-S
GK208
Market segment
Laptop
Desktop
Release date
January 2015
May 2013
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x8
PCIe 2.0 x8
Supplementary power connectors
-
None
Core clock speed
954 MHz
1046 MHz
Floating-point performance
297.6 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
915 million
915 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
33 Watt
49 Watt
Texture fill rate
30.53
33.47
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1800 MHz
5008 MHz
Memory bandwidth
14.4 GB/s
40.06 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_0)
12 (11_0)
CUDA
+
3.5
OpenCL
1.2
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-