HWBench.com

    GeForce GTX 870M vs GeForce 940MX

    GeForce GTX 870M
    Memory: 3072Mb GDDR5MOBILE
    Release date: 12 Mar 2014
    GeForce GTX 870M
    GeForce 940MX
    Memory: 2048Mb GDDR5MOBILE
    Release date: 28 Jun 2016
    GeForce 940MX

    Summary

    Reasons to consider GeForce GTX 870M

    Higher theoretical gaming performance, based on specifications.
    Supports PhysX
    Supports G-Sync
    Supports ShadowPlay (allows game streaming/recording with minimum performance penalty)
    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications

    Reasons to consider GeForce 940MX

    77 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 870M .
    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)
    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications
    GeForce GTX 870M

    HWBench recommends GeForce GTX 870M

    Based on theoretical specifications.

    Specifications

    Core Configuration

    GeForce GTX 870MGeForce 940MX
    GPU NameGK104 (N15E-GT-A2)vsGM108 (N16S-GT1R)
    Fab Process28 nmvs28 nm
    Die Size294 mm²vs0 mm²
    Transistors3,540 millionvsunknown
    Shaders1344vs384
    Compute Units7vs3
    Core clock941 MHzvs795 MHz
    ROPs24vs8
    TMUs112vs24

    Memory Configuration

    GeForce GTX 870MGeForce 940MX
    Memory TypeGDDR5vsGDDR5
    Bus Width192 bitvs64 bit
    Memory Speed1250 MHz
    5000 MHz effective    		vs1253 MHz
    5012 MHz effective
    Memory Size3072 Mbvs2048 Mb

    Additional details

    GeForce GTX 870MGeForce 940MX
    TDP100 wattsvs23 watts
    Release Date12 Mar 2014vs28 Jun 2016

    Raw Performance comparison

    Pixel Rate

    • GeForce GTX 870M
      26.35 GP/s
    • GeForce 940MX
      6.36 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GTX 870M
      105.40 GT/s
    • GeForce 940MX
      19.08 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GTX 870M
      120.00 GB/s
    • GeForce 940MX
      40.10 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GTX 870M
      2529.40 GFLOPs
    • GeForce 940MX
      610.60 GFLOPs

    GFLOPs - higher is better

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