HWBench.com

    GeForce GT 640 vs GeForce GTX 780 Ti

    GeForce GT 640
    Memory: 2048Mb DDR3DESKTOP
    Release date: 5 Jun 2012
    GeForce GT 640
    GeForce GTX 780 Ti
    Memory: 3072Mb GDDR5DESKTOP
    Release date: 7 Nov 2013
    GeForce GTX 780 Ti

    Summary

    Synthetic performance index

    • GeForce GT 640
      100%
    • GeForce GTX 780 Ti
      732%

    Relative performance

    Reasons to consider GeForce GT 640

    185 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 780 Ti .
    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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 780 Ti

    This is a much newer product, it might have better long term support.
    Around 632% 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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications
    GeForce GTX 780 Ti

    HWBench recommends GeForce GTX 780 Ti

    The GeForce GTX 780 Ti is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GT 640GeForce GTX 780 Ti
    GPU NameGK107 (GK107-300-A2)vsGK110B (GK110-425-B1)
    Fab Process28 nmvs28 nm
    Die Size118 mm²vs561 mm²
    Transistors1,270 millionvs7,080 million
    Shaders384vs2880
    Compute Units2vs15
    Core clock902 MHzvs875 MHz
    ROPs16vs48
    TMUs32vs240

    Memory Configuration

    GeForce GT 640GeForce GTX 780 Ti
    Memory TypeDDR3vsGDDR5
    Bus Width128 bitvs384 bit
    Memory Speed891 MHz
    1782 MHz effective    		vs1750 MHz
    7000 MHz effective
    Memory Size2048 Mbvs3072 Mb

    Additional details

    GeForce GT 640GeForce GTX 780 Ti
    TDP65 wattsvs250 watts
    Release Date5 Jun 2012vs7 Nov 2013

    Raw Performance comparison

    Pixel Rate

    • GeForce GT 640
      7.22 GP/s
    • GeForce GTX 780 Ti
      52.50 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GT 640
      28.90 GT/s
    • GeForce GTX 780 Ti
      210.00 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GT 640
      28.50 GB/s
    • GeForce GTX 780 Ti
      336.00 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GT 640
      692.70 GFLOPs
    • GeForce GTX 780 Ti
      5040.00 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GT 640
      2190
    • GeForce GTX 780 Ti
      16040

    Points (higher is better)

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