Maxwell GPU Surface Book (940M, GDDR5) and Mobility Radeon HD 4870 X2 - video card comparison
Maxwell GPU Surface Book (940M, GDDR5)
Mobility Radeon HD 4870 X2
Architecture
Maxwell (2014−2018)
Terascale 1 (2008−2010)
GPU code name
Surface Book
M98-XT
Market segment
Laptop
Laptop
Release date
October 2015
January 2009
Interface
-
PCIe 2.0 x16
Boost clock speed
993 MHz
-
Core clock speed
954 MHz
550 MHz
Floating-point performance
-
2x 880.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
-
956 million
Pipelines / CUDA cores
384
1600
Texture fill rate
-
22.00
Memory type
GDDR5
GDDR3, GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
256 Bit
Memory clock speed
5012 MHz
888 MHz
Memory bandwidth
-
89.6 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
DirectX 12 (FL 11_0), Shader 5.0
10.1 (10_1)
CUDA
+
-
OpenCL
-
1.1
OpenGL
-
3.3
Shader Model
-
4.1
Vulkan
-
N/A
Optimus
+
-