GeForce GT 640M and GeForce GT 720 - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce GT 720
GeForce GT 640M
946
GeForce GT 720
628
GeForce GT 640M
GeForce GT 720
Architecture
Kepler (2012−2018)
Kepler 2.0 (2013−2015)
GPU code name
N13P-GS
GK208B
Market segment
Laptop
Desktop
Release date
March 2012
September 2014
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x8
Supplementary power connectors
-
None
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
797 MHz
CUDA cores
384
192
Floating-point performance
480.0 gflops
306.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
915 million
Pipelines / CUDA cores
384
192
Power consumption (TDP)
32 Watt
19 Watt
Maximum GPU temperature
-
98 °C
Texture fill rate
Up to 20.0 billion/sec
12.75
Memory type
DDR3\GDDR5
DDR3 / GDDR5
Maximum RAM amount
2 GB
1 GB or 1 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
1.8 GBps or 5.0 GB/s
Memory bandwidth
Up to 64.0 GB/s
14.4 (DDR3) or 40 (GDDR5)
Shared memory
-
-
Display Connectors
No outputs
Dual Link DVI-DHDMIVGA
Multi monitor support
-
3 displays
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
Up to 2048x1536
2048x1536
Audio input for HDMI
-
Internal
DirectX
12 API
12 (11_0)
CUDA
+
+
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
+
+
3D Gaming
-
+
3D Vision
-
+
Optimus
+
-