HWBench.com

    GeForce GTX 660M vs GeForce GTX 850M

    GeForce GTX 660M
    Memory: 1024Mb GDDR5MOBILE
    Release date: 22 Mar 2012
    GeForce GTX 660M
    GeForce GTX 850M
    Memory: 2048Mb DDR3MOBILE
    Release date: 12 Mar 2014
    GeForce GTX 850M

    Summary

    Synthetic performance index

    • GeForce GTX 660M
      100%
    • GeForce GTX 850M
      171%

    Relative performance

    Reasons to consider GeForce GTX 660M

    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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 850M

    This is a much newer product, it might have better long term support.
    Around 71% 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    Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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 850M

    HWBench recommends GeForce GTX 850M

    The GeForce GTX 850M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GTX 660MGeForce GTX 850M
    GPU NameGK107 (N13E-GE-A2)vsGM107 (N15P-GT-A1)
    Fab Process28 nmvs28 nm
    Die Size118 mm²vs148 mm²
    Transistors1,270 millionvs1,870 million
    Shaders384vs640
    Compute Units2vs5
    Core clock835 MHzvs902 MHz
    ROPs16vs16
    TMUs32vs40

    Memory Configuration

    GeForce GTX 660MGeForce GTX 850M
    Memory TypeGDDR5vsDDR3
    Bus Width128 bitvs128 bit
    Memory Speed1000 MHz
    4000 MHz effective    		vs1001 MHz
    2002 MHz effective
    Memory Size1024 Mbvs2048 Mb

    Additional details

    GeForce GTX 660MGeForce GTX 850M
    TDP50 wattsvs45 watts
    Release Date22 Mar 2012vs12 Mar 2014

    Raw Performance comparison

    Pixel Rate

    • GeForce GTX 660M
      6.68 GP/s
    • GeForce GTX 850M
      14.43 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GTX 660M
      26.72 GT/s
    • GeForce GTX 850M
      36.10 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GTX 660M
      64.00 GB/s
    • GeForce GTX 850M
      32.00 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GTX 660M
      641.30 GFLOPs
    • GeForce GTX 850M
      1154.60 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GTX 660M
      2570
    • GeForce GTX 850M
      4420

    Points (higher is better)

    Similar comparisons