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Diamond Boost Radeon R9 270X Review

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Diamond Boost Radeon R9 270X Testing:

Testing of Diamond's R9 270X video card 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, 2560x1440, and 3840x2160 will be used. The NVIDIA comparison cards will be using the 340.52 drivers and the GTX 980 will use the latest 344.07, 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:




  • Diamond R9 270X : Core 1190MHz,  Memory 1600MHz


Overclocking Diamond's R9 270X was about as straight forward as it gets. With a lack of voltage control the only means of improving current flow to the core was by increasing the power limit settings. By maxing this setting out at +20%, I was able to boost the core clock speed on the Pitcairn-based core to 1190MHz - a 140MHz boost in clock speed over the default 1050MHz. Having worked with a couple R9 270X cards already, I had a good idea of where the core clock speed would end up, but each and every sample is different. Sometimes you get a (pardon the pun) "Diamond" in the rough.

Memory overclocking also fell into the expected range. Based on the SK Hynix GDDR5 memory ICs used, around 1600MHz is a reasonable clock speed for the memory on this card from Diamond. This card was able deliver a 200MHz increase in the GDDR5 memory speeds over the as delivered 1400MHz. The boost of the memory clock speed to 1600MHz delivers a 6400MHz data rate versus the stock 5600MHz data rate for some help when the memory is your bottleneck. Keeping the card cool is paramount to getting stable clock speeds at higher than the rated capabilities of the hardware. Bumping the fan speed up to 100% helps cool the R9 270X down enough to bring stability at the clock speeds tested.


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 3
  5. Battlefield 4
  6. Assassin's Creed IV: Black Flag
  7. Batman: Arkham Origins
  8. Unigine Heaven Benchmark 4.0
  9. 3DMark


  • Usage:

  1. Temperatures
  2. Power Consumption

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