GeForce GTX 1080 vs GeForce GTX 660

GeForce GTX 1080
Memory: 8192Mb GDDR5XDESKTOP
Release date: 27 May 2016
GeForce GTX 1080
GeForce GTX 660
Memory: 2048Mb GDDR5DESKTOP
Release date: 6 Sep 2012
GeForce GTX 660

Summary

Synthetic performance index

  • GeForce GTX 1080
    443%
  • GeForce GTX 660
    100%

Relative performance

Gaming performance index

  • GeForce GTX 1080
    442%
  • GeForce GTX 660
    100%

Relative performance

Reasons to consider GeForce GTX 1080

342% higher gaming performance.
This is a much newer product, it might have better long term support.
Supports PhysX
Supports G-Sync
Supports ShadowPlay (allows game streaming/recording with minimum performance penalty)
Supports Direct3D 12 Async Compute
Based on an outdated architecture (Nvidia Pascal), there may be no performance optimizations for current games and applications

Reasons to consider GeForce GTX 660

40 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 1080 .
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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 1080

HWBench recommends GeForce GTX 1080

The GeForce GTX 1080 is the better performing card based on the game benchmark suite used (2 combinations of games and resolutions).


Specifications

Core Configuration

GeForce GTX 1080GeForce GTX 660
GPU NameGP104 (GP104-400-A1)vsGK106 (GK106-400-A1)
Fab Process16 nmvs28 nm
Die Size314 mm²vs221 mm²
Transistors7,200 millionvs2,540 million
Shaders2560vs960
Compute Units20vs5
Core clock1607 MHzvs980 MHz
ROPs64vs24
TMUs160vs80

Memory Configuration

GeForce GTX 1080GeForce GTX 660
Memory TypeGDDR5XvsGDDR5
Bus Width256 bitvs192 bit
Memory Speed1251 MHz
10008 MHz effective
vs1502 MHz
6008 MHz effective
Memory Size8192 Mbvs2048 Mb

Additional details

GeForce GTX 1080GeForce GTX 660
TDP180 wattsvs140 watts
Release Date27 May 2016vs6 Sep 2012

Raw Performance comparison

Pixel Rate

  • GeForce GTX 1080
    102.80 GP/s
  • GeForce GTX 660
    19.60 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GTX 1080
    257.10 GT/s
  • GeForce GTX 660
    78.40 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GTX 1080
    320.00 GB/s
  • GeForce GTX 660
    144.00 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GTX 1080
    8228.00 GFLOPs
  • GeForce GTX 660
    1882.00 GFLOPs

GFLOPs - higher is better

Synthetic benchmarks

3DMark 11

  • GeForce GTX 1080
    30160
  • GeForce GTX 660
    6800

Points (higher is better)

Game benchmarks

Grand Theft Auto V

DX11, Max Details, 16:1 AF, 2xMSAA

  • GeForce GTX 1080
    159
  • GeForce GTX 660
    37

FPS (higher is better)

Grand Theft Auto V

DX11, Max Details, 16:1 AF, 2xMSAA

  • GeForce GTX 1080
    114
  • GeForce GTX 660
    25

FPS (higher is better)