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XFX XPS-850W Power Supply Review

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Closer Look (The Power Supply):

The XFX Black Edition 850W certainly has a look all of its own. Lime green cooling fan and a matte black, slightly textured, paint finish, with an overall, what would you call it, industrial look? The cooling fan grill is part of the case and at the centre is an XFX logo with a clear plastic protector that will prevent scratches and keep it shiny and unmarked until removed.


















Bottom left, you can see the large cooling grill on the rear with the IEC mains input connector, on/off switch and another XFX logo, again with a clear plastic protector that can be removed. The photograph on the right shows the front of the power supply with its green modular cable connectors and captive cable port. There isn't a protector grommet on the cable exit port, but the internal edges of the port are lapped over to prevent damage to the cables.



Here are the side panels showing the specification label on one side and an XFX logo label on the other.



The top of the power supply showing the cooling fan and a photograph of the power supply base.



The XFX Black Edition 850W power supply captive cable set. XFX has hard wired more cables than most other modular power supplies – 20/24-pin motherboard connector, ATX12V 4+4-pin connector, EPS12V 8-pin connector, and two 6+2-pin PCI-E connectors.


The modular cable box shown on earlier in the review contains a black, two-compartment, Velcro-sealed bag for the cables. Bearing the play hard logo and a part of the XFX logo in green, it is certainly different.



The full modular cable set contained inside the bag.


On all the other power supplies I have reviewed for OCC, when I have taken the lid off, I'm fairly certain that the cooling fan came with it, but not in this case. XFX has chosen not to mount the fan on the lid, instead opting to install an internal cooling fan mounting bracket. The fan used on the XFX Black Edition 850W power supply is an Adda model ADN512MB-A91 135mm 12VDC 0.27A, with a maximum speed of 2050 RPM.



The printed circuit board in the XFX Black Edition 850W is well laid out, but a quick look around didn't reveal any identification marks that could easily be nailed down to any particular manufacturer. What could be a manufacturer's part number of PF4AHT01B and a date of Oct 6 2008 are the only identifying marks I could see without dismantling the board. The electrolytic capacitors are all rated at 105°C, which are more welcome than the 85°C rated capacitors that are sometimes used. Going off the screen print near to the mains input fuse, the board is used on both 750W and 850W rated units, so it isn't run beyond its rated power.


The printed circuit board used in the XFX Black Edition 850W, after a little research, is almost certainly manufactured by Seasonic. Seasonic units on the whole are excellent, and this board is almost certainly the same as the one installed in the Seasonic M12D power supply, and probably others?



The XFX Black Edition 850W power supply ticks all the right boxes so far! The build quality is excellent and the looks and packaging, although possibly not to everybody's taste, are still nonetheless of the highest quality. Couple this with the fact that the printed circuit board is made by Seasonic, and it should be a winner. Let's have a look at the features and then put it to the test and see how it stands up to OCC testing.


  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation at 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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