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Sapphire Radeon HD 7750 Low Profile Review



Testing of the Sapphire HD 7750 Low Profile 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 adjustment will be made to the respective control panels during the testing, with the exception of the 3DMark 11 testing, where PhysX will be disabled in the NVIDIA Control Panel, if applicable. I will first test the cards at stock speeds, and then overclocked to see the effects of an increase in clock speed. The cards will be placed in order from highest to lowest performance in each graph to show where they fall by comparison. All NVIDIA comparison cards will be using the 305.37 drivers; AMD will be using Catalyst 12.6 drivers.

  • Processor: Core i7 2600K @ 4.4 GHz 100 x 44
  • CPU Cooling: Corsair H100
  • Motherboard: GIGABYTE Z68AP-D3
  • Memory: Mushkin 991996 Redline PC3-17000 9-11-10-28 16 GB
  • Video Card: Sapphire HD 7750 Low Profile
  • PSU: Antec TruePower New TP-750
  • Hard Drives: Corsair Force GT 240 GB SSD
  • Case: Corsair Obsidian 650D
  • Optical Drive: N/A
  • OS: Windows 7 Pro 64-Bit SP1


Comparison Video Cards:



  • Sapphire HD 7750 Low Profile Core 1240 MHz, Memory 1440 MHz

Although not included with the card, I used the freely available Sapphire TriXX overclocking utility to crank up the clocks on this diminutive little beast. After cranking the fan speed to 100% I proceeded through a series of tests to determine the maximum stable clock rates. The limits for the board within TriXX are +50% on the power limit (which is quite high) and 1225 mV for the core voltage (which is well within reason). I cranked both sliders to the maximum values before starting my hunt for the highest core and memory frequencies. Because this card starts out with "low" frequencies I immediately started bumping up the clocks in quite large increments. After a few iterations of testing and tuning I ended up with an overclock of 440MHz on the core (+55%) and 315MHz on the memory (+28%). This is an absolutely massive overclock! The temperatures, as you'll see later, leave a bit to be desired but aren't terribly unreasonable for such a tiny card (though you'd likely want a larger cooler if you ran these clocks 24/7).



Maximum Clock Speeds:

Testing for the maximum clock speed consists of looping Unigine 3.0 for 30 minutes each to see where the clock speeds fail when pushed. If the clock speed adjustment fails, then the clock speeds are adjusted and the test is rerun until each card passes the testing.



  • Gaming Tests:
  1. Metro 2033
  2. Batman: Arkham City
  3. Battlefield 3
  4. Sid Meier’s Civilization V
  5. Unigine Heaven Benchmark 3.0
  6. DiRT 3
  7. Mafia II
  8. 3DMark 11
  • Usage:
  1. Temperature
  2. Power Consumption

  1. Introduction & Closer Look
  2. Closer Look: Sapphire HD 7750 Low Profile
  3. Specifications & Features
  4. Testing: Setup & Overclocking
  5. Testing: Metro 2033
  6. Testing: Batman: Arkham City
  7. Testing: Battlefield 3
  8. Testing: Unigine Heaven Benchmark 3.0
  9. Testing: Sid Meier's Civilization V
  10. Testing: DiRT 3
  11. Testing: Mafia II
  12. Testing: 3DMark 11
  13. Testing: Temperatures
  14. Testing: Power Consumption
  15. Conclusion
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