Radeon R5 Graphics and GeForce 840M - video card comparison
Radeon R5 Graphics
GeForce 840M
Architecture
GCN 2.0 (2013−2017)
Maxwell (2014−2018)
GPU code name
Spectre SL
N15S-GT
Market segment
Desktop
Laptop
Release date
September 2014
March 2014
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
IGP
PCIe 3.0 x8
Boost clock speed
720 MHz
1124 MHz
Core clock speed
497 MHz
1029 MHz
Floating-point performance
388.1 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,410 million
-
Pipelines / CUDA cores
256
384
Power consumption (TDP)
15 Watt
33 Watt
Texture fill rate
7.952
17.98
Memory type
System Shared
DDR3
Maximum RAM amount
System Shared
4 GB
Memory bus width
System Shared
64 Bit
Memory clock speed
System Shared
2000 MHz
Memory bandwidth
-
16.02 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (12_0)
12 (11_0)
CUDA
-
+
OpenCL
2.0
1.2
OpenGL
4.6
4.5
Shader Model
6.0
5.1
Vulkan
1.2.131
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+