Radeon HD 6870 vs Radeon HD 6770

Radeon HD 6870
Memory: 1024Mb GDDR5DESKTOP
Release date: 21 Oct 2010
Radeon HD 6870
Radeon HD 6770
Memory: 1024Mb GDDR5DESKTOP
Release date: 21 Jan 2011
Radeon HD 6770

Summary

Synthetic performance index

  • Radeon HD 6870
    178%
  • Radeon HD 6770
    100%

Relative performance

Reasons to consider Radeon HD 6870

Around 78% higher average synthetic performance.
Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications

Reasons to consider Radeon HD 6770

43 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 6870 .
Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications

Radeon HD 6870

HWBench recommends Radeon HD 6870

The Radeon HD 6870 is the better performing card based on the synthetic benchmarks used (1 benchmarks).


Specifications

Core Configuration

Radeon HD 6870Radeon HD 6770
GPU NameBarts (Barts XT)vsJuniper (Juniper XT)
Fab Process40 nmvs40 nm
Die Size255 mm²vs166 mm²
Transistors1,700 millionvs1,040 million
Shaders1120vs800
Compute Units14vs10
Core clock900 MHzvs850 MHz
ROPs32vs16
TMUs56vs40

Memory Configuration

Radeon HD 6870Radeon HD 6770
Memory TypeGDDR5vsGDDR5
Bus Width256 bitvs128 bit
Memory Speed1050 MHz
4200 MHz effective
vs1200 MHz
4800 MHz effective
Memory Size1024 Mbvs1024 Mb

Additional details

Radeon HD 6870Radeon HD 6770
TDP151 wattsvs108 watts
Release Date21 Oct 2010vs21 Jan 2011

Raw Performance comparison

Pixel Rate

  • Radeon HD 6870
    28.80 GP/s
  • Radeon HD 6770
    13.60 GP/s

GigaPixels - higher is better

Texel Rate

  • Radeon HD 6870
    50.40 GT/s
  • Radeon HD 6770
    34.00 GT/s

GigaTexels - higher is better

Memory bandwidth

  • Radeon HD 6870
    134.00 GB/s
  • Radeon HD 6770
    76.80 GB/s

GB/s - higher is better

Single precision performance

  • Radeon HD 6870
    2016.00 GFLOPs
  • Radeon HD 6770
    1360.00 GFLOPs

GFLOPs - higher is better

Synthetic benchmarks

3DMark 11

  • Radeon HD 6870
    4540
  • Radeon HD 6770
    2550

Points (higher is better)