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Sapphire HD6670 Ultimate, HD6750 & HD6770 Review

gotdamojo06    -   June 23, 2011
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Testing:

Testing of the Sapphire HD6670 Ultimate, HD6750, and HD6770 will consist of running them and comparison cards through the OverclockersClub.com suite of games and synthetic benchmarks. This will test the performance against many popular competitors. Comparisons will be made to cards of equal and greater capabilities to show where they fall on the performance ladder. The games used are some of today's newest and most popular titles to give you an idea of how the cards perform relative to each other.

The system specifications will remain the same throughout the testing. No adjustment will be made to the respective control panels during the testing, with the exception of the 3DMark Vantage testing, where PhysX will be disabled in the NVIDIA control panel. I will test the cards at stock speeds, then overclocked in order to see the effects of any increases in clock speed. The cards are placed in order from highest to lowest performing in the graphs to show where the cards fall by comparison. The drivers used are the 11.5 Catalyst drivers for the AMD based cards and the 275.27 for NVIDIA based cards

 

Comparison Video Cards:

 

Overclocking:

  • Sapphire HD6670 Ultimate | GPU - 870 MHz | Memory - 1140 MHz
  • Sapphire HD6750 | GPU - 840 MHz | Memory - 1340 MHz
  • Sapphire HD6770 | GPU - 960 MHz | Memory - 1320 MHz

When it comes down to the overclocking of the cards, it was as always quite straight forward. The methodology behind the overclocking of all three of the graphics cards is to slightly increase the GPU core clock by 20 MHz and then run a few loops of Unigine 2.5 and Crysis Warhead until it becomes unstable. Once the card was unstable, the clock needed to be brought down by 10MHz until it became stable again during the testing. After the GPU core clock has been found, it was then time to overclock the Memory clock using the same method as overclocking the GPU Core.

The Sapphire HD6670 Ultimate was able to give me a maximum clock of 870 MHz on the GPU core and 1140 MHz on the memory core, the Sapphire HD6750 was able to hit a maximum of 840 MHz on the GPU clock and the memory clock was a maximum of 1340 MHz. Finally the HD6770 had a maximum GPU Core clock of 960 MHz and 1320 MHz on the memory clock.

 

 

Maximum Clock Speeds:

Testing for the maximum clock speed consists of looping Crysis Warhead and Unigine 2.5 for 30 minutes each to see where the clock speeds will fail when pushed. If the clock speed adjustment fails, then the clock speeds and tests are rerun until they pass the full one hour of testing.

 

  • Gaming Tests:
  1. Aliens vs. Predator
  2. Metro 2033
  3. Civilization V
  4. HAWX 2
  5. Just Cause 2
  6. Unigine Heaven Benchmark 2.5
  7. Mafia II
  8. Battlefield: Bad Company 2
  9. Lost Planet 2
  10. 3DMark 11
  • Usage:
  1. Temperature
  2. Power Consumption



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