HWBench.com

    GeForce GTX 660M vs Radeon HD 6770M

    GeForce GTX 660M
    Memory: 1024Mb GDDR5MOBILE
    Release date: 22 Mar 2012
    GeForce GTX 660M
    Radeon HD 6770M
    Memory: 1024Mb GDDR5MOBILE
    Release date: 4 Jan 2011
    Radeon HD 6770M

    Summary

    Synthetic performance index

    • GeForce GTX 660M
      172%
    • Radeon HD 6770M
      100%

    Relative performance

    Reasons to consider GeForce GTX 660M

    This is a much newer product, it might have better long term support.
    Around 72% 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    Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 Radeon HD 6770M

    Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications
    GeForce GTX 660M

    HWBench recommends GeForce GTX 660M

    The GeForce GTX 660M is the better performing card based on the synthetic benchmarks used (1 benchmarks).

    Specifications

    Core Configuration

    GeForce GTX 660MRadeon HD 6770M
    GPU NameGK107 (N13E-GE-A2)vsWhistler (Whistler XT)
    Fab Process28 nmvs40 nm
    Die Size118 mm²vs104 mm²
    Transistors1,270 millionvs716 million
    Shaders384vs480
    Compute Units2vs6
    Core clock835 MHzvs725 MHz
    ROPs16vs8
    TMUs32vs24

    Memory Configuration

    GeForce GTX 660MRadeon HD 6770M
    Memory TypeGDDR5vsGDDR5
    Bus Width128 bitvs128 bit
    Memory Speed1000 MHz
    4000 MHz effective    		vs900 MHz
    3600 MHz effective
    Memory Size1024 Mbvs1024 Mb

    Additional details

    GeForce GTX 660MRadeon HD 6770M
    TDP50 wattsvs35 watts
    Release Date22 Mar 2012vs4 Jan 2011

    Raw Performance comparison

    Pixel Rate

    • GeForce GTX 660M
      6.68 GP/s
    • Radeon HD 6770M
      5.80 GP/s

    GigaPixels - higher is better

    Texel Rate

    • GeForce GTX 660M
      26.72 GT/s
    • Radeon HD 6770M
      17.40 GT/s

    GigaTexels - higher is better

    Memory bandwidth

    • GeForce GTX 660M
      64.00 GB/s
    • Radeon HD 6770M
      57.60 GB/s

    GB/s - higher is better

    Single precision performance

    • GeForce GTX 660M
      641.30 GFLOPs
    • Radeon HD 6770M
      696.00 GFLOPs

    GFLOPs - higher is better

    Synthetic benchmarks

    3DMark 11

    • GeForce GTX 660M
      2570
    • Radeon HD 6770M
      1490

    Points (higher is better)

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