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PowerColor R9 285 Turbo Duo Review

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PowerColor R9 285 Turbo Duo Testing:

Testing of PowerColors entry in the R9 285 pool the R9 285 Turbo Duo 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 a range of capabilities to show where each card falls on the performance ladder. The games used are some of today's newest and most popular titles, which should be able to provide an idea of how the cards perform relative to each other.

The system specifications will remain the same throughout the testing. No adjustments will be made to the respective control panels during the testing to approximate the performance the end user can expect with a stock driver installation. I will be testing the cards at their stock speeds to see how they stack up and will test each one to find the maximum stable overclock. The cards will be placed in order from highest to lowest performance in each graph to show where they fall by comparison. Resolutions of 1920x1080 and 2560x1440 will be used. The NVIDIA comparison cards will be using the 340.52 drivers while AMD-based cards will be using the Catalyst 14.7 beta drivers. The R9 285 will be using the beta release driver.

 

Testing Setup:

Comparison Video Cards:

 

 

Overclocking:

  • PowerColor 29 285 Turbo Duo : Core 1075MHz,  Memory 1511MHz

 

Overclocking this latest silicon from AMD is much like overclocking any of the past revisions of AMD's Graphics Core Next architecture GPUs. To start with, the voltage control is disabled on this card meaning you will have to use the Power Limit feature to make the most of the available current being supplied to the Gold Power Kit 5+1+1 phase VRM to push the clocks on this card. By maxing out the power limit to +20% and increasing the clock speed in 50MHz increments, I was able to reach the maximum stable core clock speed fairly quickly after seeing graphic anomalies on the screen and eventually just black screens as the driver failed.

After settling on a 1075MHz clock speed for the core I moved on to the memory and used the same strategy before fine tuning the result at 1511MHz. Overall the boost in core clock speed over the 945MHz factory clock speed was 130MHz on the core or roughly 13% worth of free clock speed. The Elpida GDDR5 memory ICs gave up just under 10% more clock speed or 136MHz. These are not stellar numbers, but 10%+ bumps in overall clock speed will give you that extra few FPS that may make 2560x1440 gaming that much more enjoyable.

 

 

Maximum Clock Speeds:

Testing for the maximum clock speed consisted of looping Unigine Heaven 4.0 for thirty minutes each to see where the clock speeds failed when pushed. If the clock speed adjustment failed, then the clock speeds and tests were re-run until they passed a full hour of testing.

 

 

  • Gaming Tests:
  1. Metro: Last Light
  2. Tom Clancy's Splinter Cell: Blacklist
  3. BioShock Infinite
  4. Crysis 3
  5. Far Cry 3
  6. Battlefield 4
  7. Assassin's Creed IV: Black Flag
  8. Batman: Arkham Origins
  9. Unigine Heaven Benchmark 4.0
  10. 3DMark
  11. Ultra HD

 

  • Usage:

  1. Temperatures
  2. Power Consumption



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