Corsair RM750x 750W Power Supply

PRODUCT: RM750x 750W
PROD LINK: Corsair’s current offerings
PRICE: $129.99 @ NewEgg
Price is at the time of testing!

We start off with a rifle bearing fan right here. Similar to FDB bearings in that both are modified sleeve bearings designed to last longer, yet different enough to instill mass confusion amongst the general public.

A familiar looking CWT platform greets us on the inside.

Two Y capacitors start off our line filtering.

Soldering quality is excellent, right here. At least, from what I’ve seen so far.

More line filtering here, including four more Y caps (two after the bridge), three more X caps (one after the bridge), two coils, and a TVS diode. I have no problem with that.

I don’t quite know what that film is over the control daughterboard, but it’s nasty looking. I’m on the brink of scoring against it, but I think I’ll let it go just this once. The unit clearly worked fine, so it must not be that big a deal. An ICE2HS01G acts as the PWM controller here.

PFC parts include one diode and two F22N60E parts. I’ve removed the second Nippon Chemi-Con main filter cap so you can see a little better.

Here are the main switchers, both G20N50Cs.

Six SM4201NAs handle the 12V output for the unit on two daughterboards.

All capacitors on the secondary look to be from Chemi-Con.

Here’s the minor rail VRM, and… ok, I’m going to score the soldering around R37, R40, and R41. To me, it looks like R37 isn’t even soldered down on one end. And see that big trace just to the right of that? There’s a solder blob stuck to that I was able to scratch off with a fingernail. Nope, CWT, this won’t cut it for me. Your pick and place machine needs a talking to. I’m going to break out the iron and fix R37 real quick.

Meantime, the rest of the VRM uses an APW7159C, four M3004Ds, and two M3006Ds.

Thankfully, the soldering on the modular board looks much better than the mess on the VRM board.


Finally, it’s a show of Nippon Chemi-Con polymers on the other side of the modular board. Naturally, there’s a bunch of missing parts where the Corsair Link stuff would go to turn this into an RMi unit.