Radeon HD 6990 vs Radeon HD 7950

Radeon HD 6990
Memory: 2048Mb GDDR5DESKTOP
Release date: 8 Mar 2011
Radeon HD 6990
Radeon HD 7950
Memory: 3072Mb GDDR5DESKTOP
Release date: 31 Jan 2012
Radeon HD 7950

Summary

Synthetic performance index

  • Radeon HD 6990
    117%
  • Radeon HD 7950
    100%

Relative performance

Gaming performance index

  • Radeon HD 6990
    151%
  • Radeon HD 7950
    100%

Relative performance

Reasons to consider Radeon HD 6990

51% higher gaming performance.
Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications.

Reasons to consider Radeon HD 7950

175 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 6990 .
This is a much newer product, it might have better long term support.
Supports Direct3D 12 Async Compute.
Supports ReLive (allows game streaming/recording with minimum performance penalty).
Supports Mantle.

Radeon HD 6990

HWBench recommends Radeon HD 6990

The Radeon HD 6990 is the better performing card based on the game benchmark suite used (2 combinations of games and resolutions).


Specifications

Core Configuration

Radeon HD 6990Radeon HD 7950
GPU NameAntilles (Antilles XT)vsTahiti (Tahiti PRO)
Fab Process40 nmvs28 nm
Die Size389 mm²vs352 mm²
Transistors2,640 millionvs4,313 million
Shaders1536vs1792
Compute Units24vs28
Core clock830 MHzvs800 MHz
ROPs32vs32
TMUs96vs112

Memory Configuration

Radeon HD 6990Radeon HD 7950
Memory TypeGDDR5vsGDDR5
Bus Width256 bit x2vs384 bit
Memory Speed1250 MHz
5000 MHz effective
vs1250 MHz
5000 MHz effective
Memory Size2048 Mbvs3072 Mb

Additional details

Radeon HD 6990Radeon HD 7950
TDP375 wattsvs200 watts
Release Date8 Mar 2011vs31 Jan 2012

Raw Performance comparison

Pixel Rate

  • Radeon HD 6990
    26.60 GP/s
  • Radeon HD 7950
    25.60 GP/s

GigaPixels - higher is better

Texel Rate

  • Radeon HD 6990
    79.70 GT/s
  • Radeon HD 7950
    89.60 GT/s

GigaTexels - higher is better

Memory bandwidth

  • Radeon HD 6990
    160.00 GB/s
  • Radeon HD 7950
    240.00 GB/s

GB/s - higher is better

Single precision performance

  • Radeon HD 6990
    2550.00 GFLOPs
  • Radeon HD 7950
    2867.00 GFLOPs

GFLOPs - higher is better

Synthetic benchmarks

3DMark 11

  • Radeon HD 6990
    10720
  • Radeon HD 7950
    9130

Points (higher is better)

Game benchmarks

Bioshock Infinite

DX11, Ultra, DDOD, FXAA

  • Radeon HD 6990
    45
  • Radeon HD 7950
    36

FPS (higher is better)

Crysis 3

DX11,Very High Quality, FXAA

  • Radeon HD 6990
    41
  • Radeon HD 7950
    23

FPS (higher is better)