GeForce GTX 980 SLI Mobile and GeForce GT 635M - video card comparison
GeForce GTX 980 SLI Mobile
GeForce GT 635M
Architecture
Maxwell (2014−2018)
Fermi (2010−2014)
GPU code name
N16E-GXX SLI
N13E-GE2
Market segment
Laptop
Laptop
Release date
September 2015
December 2011
Bus support
-
PCI Express 2.0
Interface
-
PCIe 2.0 x16
SLI options
+
-
Boost clock speed
1228 MHz
753 MHz
Core clock speed
1126 MHz
Up to 675 MHz
CUDA cores
-
Up to 144
Floating-point performance
-
253.4 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
10400 Million
1,170 million
Pipelines / CUDA cores
4096
144
Power consumption (TDP)
330 Watt
35 Watt
Texture fill rate
-
Up to 16.2 billion/sec
Memory type
GDDR5
DDR3
Maximum RAM amount
2x 8 GB
2 GB
Memory bus width
256 Bit
Up to 192bit
Memory clock speed
3500 MHz
1800 MHz
Memory bandwidth
-
Up to 43.2 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
-
N/A
3D Blu-Ray
-
+
Optimus
-
+