GeForce GTX 670M and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GTX 670M vs GeForce GT 640M
GeForce GTX 670M
1788
GeForce GT 640M
943
GeForce GTX 670M
GeForce GT 640M
Architecture
Fermi (2010−2014)
Kepler (2012−2018)
GPU code name
N13E-GS1-LP
N13P-GS
Market segment
Laptop
Laptop
Release date
March 2012
March 2012
Bus support
PCI Express 2.0
PCI Express 2.0, PCI Express 3.0
Interface
MXM-B (3.0)
PCIe 3.0 x16
SLI options
+
-
Boost clock speed
-
645 MHz
Core clock speed
598 MHz
Up to 625 MHz
CUDA cores
336
384
Floating-point performance
803.7 gflops
480.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,950 million
1,270 million
Pipelines / CUDA cores
336
384
Power consumption (TDP)
75 Watt
32 Watt
Texture fill rate
33.5 billion/sec
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
192bit
128bit
Memory clock speed
1500 MHz
1800 - 4000 MHz
Memory bandwidth
72.0 GB/s
Up to 64.0 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
1.1.126
3D Blu-Ray
-
+
Optimus
+
+