Reviews - Corsair RM850 850W - CWT Edition
Sample Provided by: Corsair (By OklahomaWolf on Mon, Apr-20-2015)

Page 5 - Disassembly

The fan used in this unit is the same rifle bearing model used in its predecessor. No complaints there.

There's our CWT based innards shot now. I like how they blacked out the wiring from the VRMs to the modular board so you can't see it through the fan as easily.

Two Y capacitors are found starting off the line filtering in this unit.

Soldering is, rather uncharacteristically from CWT, excellent in this unit. No complaints there.

We see more line filtering here. Two more Y caps, two X caps, two coils, and a TVS diode for surge suppression.

That's the PWM controller up top, there. The chip near the bottom right is a 3PCS01 PFC controller. Topology is LLC resonant.

I do love it when I can identify parts without getting out the soldering iron. Main switchers are a pair of G20N50Cs.

Six SM4021NAs from Sinopower handle the 12V output of this unit from which the minor rail VRM also gets its power.

And speaking of the VRM, here it is now. One APW7159 controller, six M3006Ds split between the 5V and 3.3V rails.

There's the back of the modular cable board, and the soldering is... well, nuts.

Come on, CWT!!! Hey, original RM850 haters... do you really prefer this to Chicony's industrial grade build quality? Because I don't. Now I have to score against the soldering when the mainboard itself was flawless and a major step up from CWT's usual quality.

Finally, the business side of the modular board. Apaq makes all polymer caps in this unit, while electrolytics are handled by Nippon Chemi-Con. So, we do have all top shelf stuff in this version, which is definitely good considering who the OEM is.

But I think I just prefer the Chicony model. And I say that having owned several CWTs I hated to get rid of.

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