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PowerColor PCS+ R9 390 8GB Review

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PowerColor PCS+ R9 390 8GB Testing:

Finding out the amount of FPS performance delivered by PowerColor PCS+ R9 390 8GB will consist of running it 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 1920 x 1080, 2560 x 1440, and 3840 x 2160 will be used.


Testing Setup:

Comparison Video Cards:




  • PowerColor PCS+ R9 390 8GB : Core 1116MHz, Memory 1620MHz


Initially, when pushing the core clock speed up, I met a wall pretty quickly that required additional voltage to cross at around 1050MHz. Moving the Power limit up at this point did not help stabilize the overclock, so I pushed the voltage slider up to the +69mV level and started testing again. I finally reached the 1140MHz level on the core, but found it was stable while sticking to a resolution no greater than 2560 x 1440. Moving to 4K showed that while the PowerColor PCS+ R9 390 8GB was stable at the higher 1140MHz core clock and lower pixel density, it was just not cutting it at 3840 x 2160. I finally had to back down the core clock to 1116MHz to get it fully stable.

The memory clock was a bit easier to clock upwards, even though the amount of overclocking margin is not much above the 1500MHz base clock speed. The final clock speed on the memory was 1620MHz, or 120MHz over the rated memory speed.

After all the overclocking and tuning, I was able to pull 106MHz of margin from the core and 120MHz worth of margin from the GDDR5 memory.


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. BioShock Infinite
  3. Crysis 3
  4. Far Cry 4
  5. Battlefield 4
  6. Assassin's Creed Unity
  7. Batman: Arkham Origins
  8. Unigine Heaven Benchmark 4.0
  9. 3DMark


  • Usage:

  1. Temperatures
  2. Power Consumption

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