HWBench.com

    GeForce GTX 860M vs GeForce 840M

    GeForce GTX 860M
    Memory: 2048Mb GDDR5MOBILE
    Release date: 13 Jan 2014
    GeForce GTX 860M
    GeForce 840M
    Memory: 1024Mb DDR3MOBILE
    Release date: 12 Mar 2014
    GeForce 840M

    Summary

    Synthetic performance index

    • GeForce GTX 860M
      207%
    • GeForce 840M
      100%

    Relative performance

    Reasons to consider GeForce GTX 860M

    Around 107% 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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 840M

    42 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 860M .
    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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 860M

    HWBench recommends GeForce GTX 860M

    The GeForce GTX 860M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GTX 860MGeForce 840M
    GPU NameGM107 (N15P-GX-A1)vsGM108 (N15S-GT)
    Fab Process28 nmvs28 nm
    Die Size148 mm²vs0 mm²
    Transistors1,870 millionvsunknown
    Shaders640vs384
    Compute Units5vs3
    Core clock1020 MHzvs1029 MHz
    ROPs16vs8
    TMUs40vs16

    Memory Configuration

    GeForce GTX 860MGeForce 840M
    Memory TypeGDDR5vsDDR3
    Bus Width128 bitvs64 bit
    Memory Speed1253 MHz
    5012 MHz effective    		vs1001 MHz
    2002 MHz effective
    Memory Size2048 Mbvs1024 Mb

    Additional details

    GeForce GTX 860MGeForce 840M
    TDP75 wattsvs33 watts
    Release Date13 Jan 2014vs12 Mar 2014

    Raw Performance comparison

    Pixel Rate

    • GeForce GTX 860M
      16.32 GP/s
    • GeForce 840M
      8.23 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GTX 860M
      40.80 GT/s
    • GeForce 840M
      16.46 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GTX 860M
      80.20 GB/s
    • GeForce 840M
      16.02 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GTX 860M
      1305.60 GFLOPs
    • GeForce 840M
      790.30 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GTX 860M
      5040
    • GeForce 840M
      2430

    Points (higher is better)

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