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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications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

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