GeForce GTX 660M and GeForce GT 820M - video card comparison
Passmark - benchmark score GeForce GTX 660M vs GeForce GT 820M
GeForce GTX 660M
1478
GeForce GT 820M
584
GeForce GTX 660M
GeForce GT 820M
Architecture
Kepler (2012−2018)
Fermi 2.0 (2010−2014)
GPU code name
N13E-GE
GF117
Market segment
Laptop
Desktop
Release date
March 2012
November 2013
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 2.0 x16
SLI options
+
-
Boost clock speed
950 MHz
-
Core clock speed
835 MHz
775 MHz
CUDA cores
384
-
Floating-point performance
729.6 gflops
297.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
585 million
Pipelines / CUDA cores
384
96
Power consumption (TDP)
50 Watt
15 Watt
Texture fill rate
30.4 billion/sec
12.40
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
64 Bit
Memory clock speed
2000 MHz
1800 MHz
Memory bandwidth
64.0 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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
+
-