HWBench.com

    GeForce 840M vs GeForce 920MX

    GeForce 840M
    Memory: 1024Mb DDR3MOBILE
    Release date: 12 Mar 2014
    GeForce 840M
    GeForce 920MX
    Memory: 2048Mb DDR3MOBILE
    Release date: 1 Mar 2016
    GeForce 920MX

    Summary

    Synthetic performance index

    • GeForce 840M
      140%
    • GeForce 920MX
      100%

    Relative performance

    Reasons to consider GeForce 840M

    Around 40% higher average synthetic performance.
    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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications

    Reasons to consider GeForce 920MX

    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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 840M

    HWBench recommends GeForce 840M

    The GeForce 840M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce 840MGeForce 920MX
    GPU NameGM108 (N15S-GT)vsGM108 (N16V-GMR1-S)
    Fab Process28 nmvs28 nm
    Die Size0 mm²vs0 mm²
    Transistorsunknownvsunknown
    Shaders384vs384
    Compute Units3vs3
    Core clock1029 MHzvs1072 MHz
    ROPs8vs8
    TMUs16vs24

    Memory Configuration

    GeForce 840MGeForce 920MX
    Memory TypeDDR3vsDDR3
    Bus Width64 bitvs64 bit
    Memory Speed1001 MHz
    2002 MHz effective    		vs900 MHz
    1800 MHz effective
    Memory Size1024 Mbvs2048 Mb

    Additional details

    GeForce 840MGeForce 920MX
    TDP33 wattsvs16 watts
    Release Date12 Mar 2014vs1 Mar 2016

    Raw Performance comparison

    Pixel Rate

    • GeForce 840M
      8.23 GP/s
    • GeForce 920MX
      8.58 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce 840M
      16.46 GT/s
    • GeForce 920MX
      25.73 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce 840M
      16.02 GB/s
    • GeForce 920MX
      14.40 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce 840M
      790.30 GFLOPs
    • GeForce 920MX
      823.30 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce 840M
      2430
    • GeForce 920MX
      1730

    Points (higher is better)

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