GeForce 840M and Radeon R7 M270 - video card comparison
Passmark - benchmark score GeForce 840M vs Radeon R7 M270
GeForce 840M
1121
Radeon R7 M270
789
GeForce 840M
Radeon R7 M270
Architecture
Maxwell (2014−2018)
GCN (2011−2017)
GPU code name
N15S-GT
Opal XT / Mars
Market segment
Laptop
Laptop
Release date
March 2014
January 2014
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 3.0
Interface
PCIe 3.0 x8
PCIe 3.0 x8
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
825 MHz
Floating-point performance
863.2 gflops
633.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
950 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
33 Watt
-
Texture fill rate
17.98
19.80
Memory type
DDR3
Not Listed
Maximum RAM amount
4 GB
0 MB
Memory bus width
64 Bit
Not Listed
Memory clock speed
2000 MHz
-
Memory bandwidth
16.02 GB/s
28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
DirectX® 11
CUDA
+
-
Mantle
-
+
OpenCL
1.2
Not Listed
OpenGL
4.5
4.4
Shader Model
5.1
5.1
Vulkan
1.1.126
-
AppAcceleration
-
-
DualGraphics
-
1
Enduro
-
-
FreeSync
-
1
GameWorks
+
-
GPU Boost
2.0
-
HD3D
-
+
Optimus
+
-
PowerTune
-
+
Switchable graphics
-
1
TrueAudio
-
-
ZeroCore
-
+