GeForce GT 640 and GeForce GT 550M - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce GT 550M
GeForce GT 640
1210
GeForce GT 550M
590
GeForce GT 640
GeForce GT 550M
Architecture
Kepler (2012−2018)
Fermi (2010−2014)
GPU code name
GK107
N12P-GT
Market segment
Desktop
Laptop
Release date
June 2012
January 2011
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
902 MHz
740 MHz
CUDA cores
-
96
Floating-point performance
692.7 gflops
284.16 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
585 million
Pipelines / CUDA cores
384
96
Power consumption (TDP)
65 Watt
35 Watt
Texture fill rate
28.86
11.8 billion/sec
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
1536 MB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
900 MHz
Memory bandwidth
28.51 GB/s
28.8 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 API
CUDA
3.0
+
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
N/A
Optimus
-
+