HWBench.com

    GeForce GT 755M vs GeForce 840A

    GeForce GT 755M
    Memory: 2048Mb GDDR5MOBILE
    Release date: 25 Jun 2013
    GeForce GT 755M
    GeForce 840A
    Memory: 1024Mb DDR3MOBILE
    Release date: 17 Mar 2014
    GeForce 840A

    Summary

    Synthetic performance index

    • GeForce GT 755M
      115%
    • GeForce 840A
      100%

    Relative performance

    Reasons to consider GeForce GT 755M

    Around 15% 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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications

    Reasons to consider GeForce 840A

    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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 GT 755M

    HWBench recommends GeForce GT 755M

    The GeForce GT 755M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GT 755MGeForce 840A
    GPU NameGK107 (GT 755M)vsGM108 ()
    Fab Process28 nmvs28 nm
    Die Size118 mm²vs0 mm²
    Transistors1,270 millionvsunknown
    Shaders384vs384
    Compute Units2vs3
    Core clock980 MHzvs1029 MHz
    ROPs16vs8
    TMUs32vs16

    Memory Configuration

    GeForce GT 755MGeForce 840A
    Memory TypeGDDR5vsDDR3
    Bus Width128 bitvs64 bit
    Memory Speed1350 MHz
    5400 MHz effective    		vs1001 MHz
    2002 MHz effective
    Memory Size2048 Mbvs1024 Mb

    Additional details

    GeForce GT 755MGeForce 840A
    TDP50 wattsvs33 watts
    Release Date25 Jun 2013vs17 Mar 2014

    Raw Performance comparison

    Pixel Rate

    • GeForce GT 755M
      7.84 GP/s
    • GeForce 840A
      8.23 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GT 755M
      31.36 GT/s
    • GeForce 840A
      16.46 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GT 755M
      86.40 GB/s
    • GeForce 840A
      16.02 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GT 755M
      752.60 GFLOPs
    • GeForce 840A
      790.30 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GT 755M
      2800
    • GeForce 840A
      2430

    Points (higher is better)

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