Maxwell GPU Surface Book (940M, GDDR5) and GeForce 820M - video card comparison
Maxwell GPU Surface Book (940M, GDDR5)
GeForce 820M
Architecture
Maxwell (2014−2018)
Fermi (2010−2014)
GPU code name
Surface Book
N15V-GM
Market segment
Laptop
Laptop
Release date
October 2015
January 2014
Bus support
-
PCI Express 2.0
Interface
-
PCIe 2.0 x16
Boost clock speed
993 MHz
-
Core clock speed
954 MHz
775 MHz
Floating-point performance
-
240.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
585 million
Pipelines / CUDA cores
384
96
Power consumption (TDP)
-
15 Watt
Texture fill rate
-
10.00
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
5012 MHz
1800 MHz
Memory bandwidth
-
14.4 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
DirectX 12 (FL 11_0), Shader 5.0
12 (11_0)
CUDA
+
+
OpenCL
-
1.1
OpenGL
-
4.5
Shader Model
-
5.1
Vulkan
-
N/A
GameWorks
-
+
GPU Boost
-
2.0
Optimus
+
+