HWBench.com

    GeForce GT 640M vs GeForce GTX 950M

    GeForce GT 640M
    Memory: 2048Mb DDR3MOBILE
    Release date: 22 Mar 2012
    GeForce GT 640M
    GeForce GTX 950M
    Memory: 4096Mb DDR3MOBILE
    Release date: 13 Mar 2015
    GeForce GTX 950M

    Summary

    Synthetic performance index

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

    Relative performance

    Reasons to consider GeForce GT 640M

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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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

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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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

    HWBench recommends GeForce GTX 950M

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

    Specifications

    Core Configuration

    GeForce GT 640MGeForce GTX 950M
    GPU NameGK107 (N13P-GS)vsGM107 (N16P-GT)
    Fab Process28 nmvs28 nm
    Die Size118 mm²vs148 mm²
    Transistors1,270 millionvs1,870 million
    Shaders384vs640
    Compute Units2vs5
    Core clock625 MHzvs993 MHz
    ROPs16vs16
    TMUs32vs40

    Memory Configuration

    GeForce GT 640MGeForce GTX 950M
    Memory TypeDDR3vsDDR3
    Bus Width128 bitvs128 bit
    Memory Speed900 MHz
    1800 MHz effective    		vs900 MHz
    1800 MHz effective
    Memory Size2048 Mbvs4096 Mb

    Additional details

    GeForce GT 640MGeForce GTX 950M
    TDP32 wattsvs75 watts
    Release Date22 Mar 2012vs13 Mar 2015

    Raw Performance comparison

    Pixel Rate

    • GeForce GT 640M
      5.00 GP/s
    • GeForce GTX 950M
      15.89 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GT 640M
      20.00 GT/s
    • GeForce GTX 950M
      39.70 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GT 640M
      28.80 GB/s
    • GeForce GTX 950M
      28.80 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GT 640M
      480.00 GFLOPs
    • GeForce GTX 950M
      1271.00 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

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

    Points (higher is better)

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