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Old 01-23-2013, 07:08 AM   #1
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Default XFX PRO 850 W Black Edition Full Modular Power Supply Review

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Title: XFX PRO 850 W Black Edition Full Modular Power Supply Review
URL: http://www.hardwaresecrets.com/artic...ly-Review/1716

Here is a snippet:
"XFX recently released a new series of power supplies with the 80 Plus Gold certification and a fully modular cabling system, with 750 W, 850 W, 1,050 W, and 1,250 W versions, dubbed the PRO Black Edit..."

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Old 01-23-2013, 11:01 AM   #2
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XFX advertise "Modular 6+2-pin PCI-E:6". Maybe you should ask XFX if the product is actually supposed to come with 6 PCIe cables?

Source:
http://xfxforce.com/en-us/Products/P...850B-BEFX.aspx
Specifications tabs.
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Old 01-23-2013, 03:16 PM   #3
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That has to be one of the cleanest internals I've seen on an modular PSU in ages

as to the cables if you take a look at the pic that shows the cable lineup on their website it doesn't show 6x PCIe 6+2 cables I think that you'll find you can do 6 but you'll need to provide the other cables yourself or is it actually this

The XFX Difference
Other Great Features
Full Modular Design
Up to Eight (8) PCI-E 6+2 Pin Connectors
True Wattage Guarantee
Tight DC voltage regulation with minimal AC ripple
Extreme Heat Tested Capacitors
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Old 01-24-2013, 07:31 AM   #4
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Hi,

The power supply SUPPORTS up to four video card cables (for a total of eight connectors) but it only comes with two cables.

Gabriel.
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Old 01-25-2013, 02:04 AM   #5
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Gabriel since this is the fifth or sixth unit with this platform you have reviewed you must know this design forward and backwards. So could you help me identify the transformers???



If my understanding is correct the bottom transformer is the +5vsb and the big one in the middle is the +12v transformer.

The small transformer on the top next to the primary caps I' m guessing is the isolator transformer for the PFC transistors. If so is the one between that isolator and +12 transformer also a transformer for the CM6901 resonant/pwm controller for the switching transistors.???
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Old 01-25-2013, 07:39 AM   #6
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Top transformer is the isolator transformer for the switching transistors (not for the active PFC transistors), as the CM6901 IC is located in the secondary.

The "transformer" between this one and the main transformer is not a transformer, but a coil used by the resonant design; remember, the design used is called LLC, which uses two coils (L) e one capacitor (C). The two coils are this "transformer" and the main transformer.

And the bottom transformer is the +5VSB transformer.

I hope I have helped.

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Old 01-25-2013, 08:30 AM   #7
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Quote:
Originally Posted by Gabriel Torres View Post
Top transformer is the isolator transformer for the switching transistors (not for the active PFC transistors), as the CM6901 IC is located in the secondary.

The "transformer" between this one and the main transformer is not a transformer, but a coil used by the resonant design; remember, the design used is called LLC, which uses two coils (L) e one capacitor (C). The two coils are this "transformer" and the main transformer.

And the bottom transformer is the +5VSB transformer.

I hope I have helped.

Gabriel.
Yes, you have have helped thank you. I need to do more studying about the LLC design.

The CM6901 resonant/pwm controller being in the secondary is a bit confusing since it is part of the primary side circuits. I know its on the same daughter card with the secondary 12V transistors, which is behind the transformers.

Last edited by Merman; 01-25-2013 at 08:59 AM. Reason: forgot to say thanks
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