Radeon R9 M385 and Maxwell GPU Surface Book (940M, GDDR5) - video card comparison
Radeon R9 M385
Maxwell GPU Surface Book (940M, GDDR5)
Architecture
GCN (2011−2017)
Maxwell (2014−2018)
GPU code name
Strato
Surface Book
Market segment
Laptop
Laptop
Release date
June 2015
October 2015
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
-
Boost clock speed
1100 MHz
993 MHz
Core clock speed
-
954 MHz
Floating-point performance
1,792 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,080 million
-
Pipelines / CUDA cores
896
384
Texture fill rate
56.00
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1500 MHz
5012 MHz
Memory bandwidth
76.8 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
Eyefinity
1
-
DirectX
DirectX® 12
DirectX 12 (FL 11_0), Shader 5.0
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
-
OpenGL
4.4
-
Shader Model
6.3
-
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
+
-
ZeroCore
+
-