GeForce GTX 670M and GeForce GT 640 - video card comparison
Passmark - benchmark score GeForce GTX 670M vs GeForce GT 640
GeForce GTX 670M
1788
GeForce GT 640
1210
GeForce GTX 670M
GeForce GT 640
Architecture
Fermi (2010−2014)
Kepler (2012−2018)
GPU code name
N13E-GS1-LP
GK107
Market segment
Laptop
Desktop
Release date
March 2012
June 2012
Bus support
PCI Express 2.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
-
None
SLI options
+
-
Core clock speed
598 MHz
902 MHz
CUDA cores
336
-
Floating-point performance
803.7 gflops
692.7 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
65 Watt
Texture fill rate
33.5 billion/sec
28.86
Memory type
GDDR5
DDR3
Maximum RAM amount
3 GB
2 GB
Memory bus width
192bit
128 Bit
Memory clock speed
1500 MHz
1782 MHz
Memory bandwidth
72.0 GB/s
28.51 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_0)
CUDA
+
3.0
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
N/A
1.1.126
Optimus
+
-