GeForce GTX 660M and GeForce GT 555M 3 GB - video card comparison
GeForce GTX 660M
GeForce GT 555M 3 GB
Architecture
Kepler (2012−2018)
Fermi (2010−2014)
GPU code name
N13E-GE
GF106
Market segment
Laptop
Desktop
Release date
March 2012
March 2011
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 2.0 x16
Supplementary power connectors
-
None
SLI options
+
-
Boost clock speed
950 MHz
-
Core clock speed
835 MHz
590 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
1,170 million
Pipelines / CUDA cores
384
144
Power consumption (TDP)
50 Watt
35 Watt
Texture fill rate
30.4 billion/sec
14.16
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
3 GB
Memory bus width
128bit
192 Bit
Memory clock speed
2000 MHz
1800 MBps
Memory bandwidth
64.0 GB/s
43.2 GB/s
Shared memory
-
-
Display Connectors
No outputs
Portable Device Dependent
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
1.1.126
N/A
Optimus
+
-