GeForce GTX 980 SLI Mobile and GeForce GTX 660M - video card comparison
GeForce GTX 980 SLI Mobile
GeForce GTX 660M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
N16E-GXX SLI
N13E-GE
Market segment
Laptop
Laptop
Release date
September 2015
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
-
MXM-B (3.0)
SLI options
+
+
Boost clock speed
1228 MHz
950 MHz
Core clock speed
1126 MHz
835 MHz
CUDA cores
-
384
Floating-point performance
-
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
10400 Million
1,270 million
Pipelines / CUDA cores
4096
384
Power consumption (TDP)
330 Watt
50 Watt
Texture fill rate
-
30.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
2x 8 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
3500 MHz
2000 MHz
Memory bandwidth
-
64.0 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
G-SYNC support
+
-
DirectX
12_1
12 API
CUDA
+
+
OpenCL
-
1.1
OpenGL
-
4.5
Shader Model
-
5.1
Vulkan
-
1.1.126
Optimus
-
+