GeForce GTX 660 vs Radeon HD 6390

GeForce GTX 660
Memory: 2048Mb GDDR5DESKTOP
Release date: 6 Sep 2012
GeForce GTX 660
Radeon HD 6390
Memory: 1024Mb DDR2DESKTOP
Release date: 4 Jul 2011
Radeon HD 6390

Summary

Reasons to consider GeForce GTX 660

This is a much newer product, it might have better long term support.
Higher theoretical gaming performance, based on specifications.
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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 6390

101 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 660 .
Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications

GeForce GTX 660

HWBench recommends GeForce GTX 660

Based on theoretical specifications.


Specifications

Core Configuration

GeForce GTX 660Radeon HD 6390
GPU NameGK106 (GK106-400-A1)vsRedwood (Redwood LE)
Fab Process28 nmvs40 nm
Die Size221 mm²vs104 mm²
Transistors2,540 millionvs627 million
Shaders960vs320
Compute Units5vs4
Core clock980 MHzvs550 MHz
ROPs24vs8
TMUs80vs16

Memory Configuration

GeForce GTX 660Radeon HD 6390
Memory TypeGDDR5vsDDR2
Bus Width192 bitvs128 bit
Memory Speed1502 MHz
6008 MHz effective
vs500 MHz
1000 MHz effective
Memory Size2048 Mbvs1024 Mb

Additional details

GeForce GTX 660Radeon HD 6390
TDP140 wattsvs39 watts
Release Date6 Sep 2012vs4 Jul 2011

Raw Performance comparison

Pixel Rate

  • GeForce GTX 660
    19.60 GP/s
  • Radeon HD 6390
    4.40 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GTX 660
    78.40 GT/s
  • Radeon HD 6390
    8.80 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GTX 660
    144.00 GB/s
  • Radeon HD 6390
    16.00 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GTX 660
    1882.00 GFLOPs
  • Radeon HD 6390
    352.00 GFLOPs

GFLOPs - higher is better