Maxwell GPU Surface Book (940M, GDDR5) and Radeon HD 8670M - video card comparison
Maxwell GPU Surface Book (940M, GDDR5)
Radeon HD 8670M
Architecture
Maxwell (2014−2018)
GCN (2011−2017)
GPU code name
Surface Book
Sun
Market segment
Laptop
Laptop
Release date
October 2015
November 2012
Interface
-
PCIe 3.0 x8
Boost clock speed
993 MHz
825 MHz
Core clock speed
954 MHz
775 MHz
Floating-point performance
-
633.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
690 million
Pipelines / CUDA cores
384
384
Texture fill rate
-
19.50
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
5012 MHz
2000 MHz
Memory bandwidth
-
16 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
+
-