GeForce GT 640M and GeForce GT 640M LE - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce GT 640M LE
GeForce GT 640M
943
GeForce GT 640M LE
720
GeForce GT 640M
GeForce GT 640M LE
Architecture
Kepler (2012−2018)
Fermi / Kepler (2012)
GPU code name
N13P-GS
N13P-LP
Market segment
Laptop
Laptop
Release date
March 2012
March 2012
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Boost clock speed
645 MHz
-
Core clock speed
Up to 625 MHz
Up to 500 MHz
CUDA cores
384
Up to 384
Floating-point performance
480.0 gflops
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
585 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
32 Watt
20 Watt
Texture fill rate
Up to 20.0 billion/sec
Up to 16.0 billion/sec
Memory type
DDR3\GDDR5
DDR3\DDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
128bit
Memory clock speed
1800 - 4000 MHz
1800 - 4000 MHz
Memory bandwidth
Up to 64.0 GB/s
Up to 28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
Up to 2048x1536
Up to 2048x1536
DirectX
12 API
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
N/A
3D Blu-Ray
+
+
Optimus
+
+