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XFX Pro Series Core Edition Power Supply Review




Price Per the Watt:

Power Supply XFX Pro Series Core Edition 650W at $89.00 = $0.14/Watt (02-2011)
Power Supply XFX Pro Series Core Edition 750W at $109.00 = $0.15/Watt (02-2011)
Power Supply XFX Pro Series Core Edition 850W at $129.00 = $0.20/Watt (02-2011)


I had intended to write a separate conclusion for each power supply but the XFX Pro Series Core Edition power supplies have performed similarly throughout testing so I don’t think it necessary.

XFX place great importance (throughout the packaging and their literature) on the EasyRail technology used in the Pro Series power supplies. What is EasyRail technology? It’s marketing speak for a single 12V rail and the added benefits of no load balancing and the possibility of locked in or lost power that can sometimes result on multi-12V railed power supplies.

The XFX Pro Series Core Edition power supplies performed very well across the range. The DC voltage load regulation was excellent from 20% to 100% DC loading and in combination with very low AC ripple/noise levels means excellent DC quality on all rails on all three power supplies. The 3V3 and 5V0 rails dipped a little lower than I would have liked but they still remained well within the limits set down by the ATX12V V2.2 specification and won’t prove to be a problem when the biggest dip below ideal rail voltage was only 0.09V. Efficiency levels across the range are acceptable with the PRO850W proving marginally more efficient than the others and efficiencies in the low to middle eighties are on a par with other units in this class.

The only difference across the range is an extra three SATA connectors on the PRO850W so power supply selection at the build stage is important and is really graphic card dependent although any of the three power supplies could power a dual graphics configuration on a fairly standard PC. If the intended build involves powerful graphics cards, multiple hard disk drives, cooling fans, etc and a certain amount of overclocking, the PRO750W or PRO850W would be a more sensible choice.

The XFX Pro series power supplies are, as you’d expect, physically alike across the range and with good build quality and their unique styling will probably appeal to many enthusiasts. If you are in the market for a high quality wired power supply, at a fair price, then I highly recommend any of the XFX Pro Series Core Edition units. I have no hesitation in awarding all three XFX Pro Series Core Edition power supplies the OCC Gold award.



  • Excellent DC quality
  • 80 Plus Bronze certification
  • 5 year warranty
  • Build quality
  • Price
  • Plenty of connectors


  • Fan noise at full load maybe a problem for some?
OCC Gold

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing the PRO650W: DC Voltage Load Regulation
  5. Testing the PRO750W: DC Voltage Load Regulation
  6. Testing the PRO850W: DC Voltage Load Regulation
  7. Testing the PRO650W: Efficiency, Power Factor & DC Quality
  8. Testing the PRO750W: Efficiency, Power Factor & DC Quality
  9. Testing the PRO850W: Efficiency, Power Factor & DC Quality
  10. Testing: Temperature, Noise Level & Fan Speed
  11. Conclusions
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