GeForce GT 555M and GeForce 620M - video card comparison
GeForce GT 555M
GeForce 620M
Architecture
Fermi (2010−2014)
Fermi 2.0 (2010−2014)
GPU code name
N12E-GE-B
GF117
Market segment
Laptop
Desktop
Release date
January 2011
March 2012
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
SLI options
+
-
Boost clock speed
753 MHz
-
Core clock speed
Up to 753 MHz
625 MHz
CUDA cores
Up to 144
-
Floating-point performance
388.8 gflops
240.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,170 million
585 million
Pipelines / CUDA cores
144
96
Power consumption (TDP)
35 Watt
15 Watt
Texture fill rate
Up to 16.2 billion/sec
10.00
Memory type
DDR3\DDR5
DDR3
Maximum RAM amount
3 GB
1 GB
Memory bus width
Up to 192 bit/128 Bit
64 Bit
Memory clock speed
Up to 1569 MHz
1800 MHz
Memory bandwidth
Up to 50.2 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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
3D Blu-Ray
+
-
3D Gaming
+
-
Optimus
+
-