GeForce GT 635M and GeForce GT 640M LE - video card comparison
Passmark - benchmark score GeForce GT 635M vs GeForce GT 640M LE
GeForce GT 635M
578
GeForce GT 640M LE
720
GeForce GT 635M
GeForce GT 640M LE
Architecture
Fermi (2010−2014)
Fermi / Kepler (2012)
GPU code name
N13E-GE2
N13P-LP
Market segment
Laptop
Laptop
Release date
December 2011
March 2012
Bus support
PCI Express 2.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Boost clock speed
753 MHz
-
Core clock speed
Up to 675 MHz
Up to 500 MHz
CUDA cores
Up to 144
Up to 384
Floating-point performance
253.4 gflops
384.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,170 million
585 million
Pipelines / CUDA cores
144
384
Power consumption (TDP)
35 Watt
20 Watt
Texture fill rate
Up to 16.2 billion/sec
Up to 16.0 billion/sec
Memory type
DDR3
DDR3\DDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
Up to 192bit
128bit
Memory clock speed
1800 MHz
1800 - 4000 MHz
Memory bandwidth
Up to 43.2 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
N/A
N/A
3D Blu-Ray
+
+
Optimus
+
+