GeForce GT 640M and GeForce GT 635M - video card comparison
Passmark - benchmark score GeForce GT 640M vs GeForce GT 635M
GeForce GT 640M
943
GeForce GT 635M
578
GeForce GT 640M
GeForce GT 635M
Architecture
Kepler (2012−2018)
Fermi (2010−2014)
GPU code name
N13P-GS
N13E-GE2
Market segment
Laptop
Laptop
Release date
March 2012
December 2011
Bus support
PCI Express 2.0, PCI Express 3.0
PCI Express 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Boost clock speed
645 MHz
753 MHz
Core clock speed
Up to 625 MHz
Up to 675 MHz
CUDA cores
384
Up to 144
Floating-point performance
480.0 gflops
253.4 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
1,170 million
Pipelines / CUDA cores
384
144
Power consumption (TDP)
32 Watt
35 Watt
Texture fill rate
Up to 20.0 billion/sec
Up to 16.2 billion/sec
Memory type
DDR3\GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128bit
Up to 192bit
Memory clock speed
1800 - 4000 MHz
1800 MHz
Memory bandwidth
Up to 64.0 GB/s
Up to 43.2 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
+
+