GeForce 840M vs Radeon R5 M420
We compared two Mobile platform GPUs: 2GB VRAM GeForce 840M and 4GB VRAM Radeon R5 M420 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce 840M Advantages
Boost Clock has increased by 32% (1124MHz vs 850MHz)
Larger VRAM bandwidth (16.02GB/s vs 16.00GB/s)
64 additional rendering cores
Radeon R5 M420 Advantages
Released 2 years and 2 months late
More VRAM (4GB vs 2GB)
Score
Benchmark
FP32 (float)
GeForce 840M
+58%
863
Radeon R5 M420
544
Graphics Card
Mar 2014
Release Date
May 2016
GeForce 800M
Generation
Gem System
Mobile
Type
Mobile
PCIe 3.0 x8
Bus Interface
PCIe 3.0 x8
Clock Speeds
1029 MHz
Base Clock
780 MHz
1124 MHz
Boost Clock
850 MHz
1001 MHz
Memory Clock
1000 MHz
Memory
2GB
Memory Size
4GB
DDR3
Memory Type
DDR3
64bit
Memory Bus
64bit
16.02GB/s
Bandwidth
16.00GB/s
Render Config
-
Compute Units
5
384
Shading Units
320
16
TMUs
20
8
ROPs
8
64 KB (per SMM)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
128 KB
Theoretical Performance
8.992 GPixel/s
Pixel Rate
6.800 GPixel/s
17.98 GTexel/s
Texture Rate
17.00 GTexel/s
863.2 GFLOPS
FP32 (float)
544.0 GFLOPS
26.98 GFLOPS
FP64 (double)
34.00 GFLOPS
Board Design
33W
TDP
Unknown
No outputs
Outputs
Portable Device Dependent
Graphics Processor
GM108
GPU Name
Jet
N15S-GT
GPU Variant
Jet PRO
(216-0856040)
(216-0856040)
Maxwell
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
Unknown
Transistors
0.69 billion
Unknown
Die Size
56 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
2.1 (1.2)
1.3
Vulkan
1.2.170
5.0
CUDA
-
5.1
Shader Model
6.5 (5.1)