GeForce GTX 670M and GeForce GT 645 OEM - video card comparison
GeForce GTX 670M
GeForce GT 645 OEM
Architecture
Fermi (2010−2014)
Fermi 2.0 (2010−2014)
GPU code name
N13E-GS1-LP
GF114
Market segment
Laptop
Desktop
Release date
March 2012
April 2012
Bus support
PCI Express 2.0
-
Interface
MXM-B (3.0)
PCIe 2.0 x16
SLI options
+
-
Core clock speed
598 MHz
776 MHz
CUDA cores
336
-
Floating-point performance
803.7 gflops
894.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
1,950 million
1,950 million
Pipelines / CUDA cores
336
288
Power consumption (TDP)
75 Watt
102 Watt
Texture fill rate
33.5 billion/sec
37.25
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
192bit
192 Bit
Memory clock speed
1500 MHz
3828 MHz
Memory bandwidth
72.0 GB/s
91.87 GB/s
Shared memory
-
-
Display Connectors
No outputs
2x DVI, 1x mini-HDMI
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
12 (11_0)
CUDA
+
2.1
OpenCL
1.1
1.1
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
N/A
N/A
Optimus
+
-