GeForce 840M vs GeForce 940MX

GeForce 840M
Memory: 1024Mb DDR3MOBILE
Release date: 12 Mar 2014
GeForce 840M
GeForce 940MX
Memory: 2048Mb GDDR5MOBILE
Release date: 28 Jun 2016
GeForce 940MX

Summary

Reasons to consider GeForce 840M

Higher theoretical gaming performance, based on specifications.
Supports PhysX.
Supports G-Sync.
Supports ShadowPlay (allows game streaming/recording with minimum performance penalty).

Reasons to consider GeForce 940MX

This is a much newer product, it might have better long term support.
Supports PhysX.
Supports G-Sync.
Supports ShadowPlay (allows game streaming/recording with minimum performance penalty).

GeForce 840M

HWBench recommends GeForce 840M

Based on theoretical specifications.


Specifications

Core Configuration

GeForce 840MGeForce 940MX
GPU NameGM108 (N15S-GT)vsGM108 (N16S-GT1R)
Fab Process28 nmvs28 nm
Die Size0 mm²vs0 mm²
Transistorsunknownvsunknown
Shaders384vs384
Compute Units3vs3
Core clock1029 MHzvs795 MHz
ROPs8vs8
TMUs16vs24

Memory Configuration

GeForce 840MGeForce 940MX
Memory TypeDDR3vsGDDR5
Bus Width64 bitvs64 bit
Memory Speed1001 MHz
2002 MHz effective
vs1253 MHz
5012 MHz effective
Memory Size1024 Mbvs2048 Mb

Additional details

GeForce 840MGeForce 940MX
TDP33 wattsvs23 watts
Release Date12 Mar 2014vs28 Jun 2016

Raw Performance comparison

Pixel Rate

  • GeForce 840M
    8.23 GP/s
  • GeForce 940MX
    6.36 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce 840M
    16.46 GT/s
  • GeForce 940MX
    19.08 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce 840M
    16.02 GB/s
  • GeForce 940MX
    40.10 GB/s

GB/s - higher is better

Single precision performance

  • GeForce 840M
    790.30 GFLOPs
  • GeForce 940MX
    610.60 GFLOPs

GFLOPs - higher is better

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