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    GeForce GT 640M Mac Edition vs GeForce GTX 950M Mac Edition

    GeForce GT 640M Mac Edition
    Memory: 512Mb GDDR5MOBILE
    Release date: 3 Feb 2013
    GeForce GT 640M Mac Edition
    GeForce GTX 950M Mac Edition
    Memory: 2048Mb GDDR5MOBILE
    Release date: 13 Mar 2015
    GeForce GTX 950M Mac Edition
    You are comparing OEM or variant versions of at least one VGA. Did you mean GeForce GT 640M vs GeForce GTX 950M instead?

    Summary

    Synthetic performance index

    • GeForce GT 640M Mac Edition
      100%
    • GeForce GTX 950M Mac Edition
      249%

    Relative performance

    Reasons to consider GeForce GT 640M Mac Edition

    43 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 950M Mac Edition .
    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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 GTX 950M Mac Edition

    This is a much newer product, it might have better long term support.
    Around 149% 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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications
    GeForce GTX 950M Mac Edition

    HWBench recommends GeForce GTX 950M Mac Edition

    The GeForce GTX 950M Mac Edition is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GT 640M Mac EditionGeForce GTX 950M Mac Edition
    GPU NameGK107 (N13P-GS)vsGM107 (N16P-GT)
    Fab Process28 nmvs28 nm
    Die Size118 mm²vs148 mm²
    Transistors1,270 millionvs1,870 million
    Shaders384vs640
    Compute Units2vs5
    Core clock745 MHzvs914 MHz
    ROPs8vs16
    TMUs32vs40

    Memory Configuration

    GeForce GT 640M Mac EditionGeForce GTX 950M Mac Edition
    Memory TypeGDDR5vsGDDR5
    Bus Width64 bitvs128 bit
    Memory Speed1250 MHz
    5000 MHz effective    		vs1000 MHz
    4000 MHz effective
    Memory Size512 Mbvs2048 Mb

    Additional details

    GeForce GT 640M Mac EditionGeForce GTX 950M Mac Edition
    TDP32 wattsvs75 watts
    Release Date3 Feb 2013vs13 Mar 2015

    Raw Performance comparison

    Pixel Rate

    • GeForce GT 640M Mac Edition
      5.96 GP/s
    • GeForce GTX 950M Mac Edition
      14.62 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GT 640M Mac Edition
      23.84 GT/s
    • GeForce GTX 950M Mac Edition
      36.60 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GT 640M Mac Edition
      40.00 GB/s
    • GeForce GTX 950M Mac Edition
      64.00 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GT 640M Mac Edition
      572.20 GFLOPs
    • GeForce GTX 950M Mac Edition
      1169.90 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GT 640M Mac Edition
      1770
    • GeForce GTX 950M Mac Edition
      4410

    Points (higher is better)

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