Maxwell GPU Surface Book (940M, GDDR5) and Radeon HD 8870M - video card comparison
Maxwell GPU Surface Book (940M, GDDR5)
Radeon HD 8870M
Architecture
Maxwell (2014−2018)
GCN (2011−2017)
GPU code name
Surface Book
Venus
Market segment
Laptop
Laptop
Release date
October 2015
December 2012
Interface
-
PCIe 3.0 x16
Boost clock speed
993 MHz
775 MHz
Core clock speed
954 MHz
725 MHz
Floating-point performance
-
992.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
1,500 million
Pipelines / CUDA cores
384
640
Texture fill rate
-
31.00
Memory type
GDDR5
GDDR5, DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5012 MHz
4500 MHz
Memory bandwidth
-
72 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
DirectX 12 (FL 11_0), Shader 5.0
12 (11_1)
CUDA
+
-
OpenCL
-
1.2
OpenGL
-
4.6
Shader Model
-
5.1
Vulkan
-
1.2.131
Optimus
+
-