HWBench.com

    GeForce 840M vs GeForce 920M

    GeForce 840M
    Memory: 1024Mb DDR3MOBILE
    Release date: 12 Mar 2014
    GeForce 840M
    GeForce 920M
    Memory: 2048Mb DDR3MOBILE
    Release date: 13 Mar 2015
    GeForce 920M

    Summary

    Synthetic performance index

    • GeForce 840M
      140%
    • GeForce 920M
      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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 920M

    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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 920M
    GPU NameGM108 (N15S-GT)vsGK208 (N16V-GM)
    Fab Process28 nmvs28 nm
    Die Size0 mm²vs87 mm²
    Transistorsunknownvsunknown
    Shaders384vs384
    Compute Units3vs2
    Core clock1029 MHzvs954 MHz
    ROPs8vs16
    TMUs16vs32

    Memory Configuration

    GeForce 840MGeForce 920M
    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 920M
    TDP33 wattsvs33 watts
    Release Date12 Mar 2014vs13 Mar 2015

    Raw Performance comparison

    Pixel Rate

    • GeForce 840M
      8.23 GP/s
    • GeForce 920M
      7.63 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce 840M
      16.46 GT/s
    • GeForce 920M
      30.53 GT/s

    GigaTexels - higher is better

    Memory bandwidth

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

    GB/s - higher is better

    Single precision performance

    • GeForce 840M
      790.30 GFLOPs
    • GeForce 920M
      732.70 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce 840M
      2430
    • GeForce 920M
      1730

    Points (higher is better)

    Similar comparisons