Corsair RM1000x 1000W Power Supply

Corsair’s been in the power supply business for quite a few years now. Lately, some have charged that they have lost their way in the marketplace, offering units that cost more than the competition and offer less performance. Corsair’s never been a company to back down from this kind of criticism, and as proof, they have come to me with a brand new unit called the RM1000x. This is a tweaked version of the 80 Plus Gold RM series, and it makes some pretty bold promises. Let’s see what this unit has to offer.

PRODUCT: RM1000x 1000W
PROD LINK: RM1000x Product Page
PRICE: $169.99 @ NewEgg
Price is at the time of testing!

The day has finally arrived. The boss told me I had to review an RMX today, and so I have pulled off the shelf the first thing I could think of bearing those letters: the QSC RMX 1850HD pro audio power amplifier that’s been powering my home theater LFE channel since 2009. You know, I’ve never reviewed an amp before… I wonder if I can really do justice to it. Now, then… QSC stands for Quilter Sound Company. Back in the late 60s, a young man named Patrick Quilter started the company because so many of his friends were coming up to him asking for guitar amps. He was an engineering student at the time and apparently decided that since people were throwing money at him in exchange for goods and services, he’d just get up go into business for…

Dang it, I just read the email I got from the boss again. I’m not supposed to be reviewing this amp, I’m supposed to be reviewing a Corsair RMX instead. That’s probably for the best… the amp weighs more than a small child and I was really not looking forward to the disassembly part.

Here’s the real subject of this review, the Corsair RM1000x. This is the latest line of units to come from the Corsair people bearing some variant of the RM name, and presumably is yet another update to that series. First, we had the original RMs, which were built by Chicony. I thought they were pretty good. Other people didn’t, preferring to lose their minds over the capacitors. Corsair updated those units, moving to CWT as their OEM, complete with upgraded capacitors. People still lost their minds. “Oh, those RMs are sucky, Corsair sucks these days, u gotta buy EVGA now LOLOLOLOILLLLLOIOIILLIILLLLL!”

So Corsair took the new CWT platform and made changes to make the RMs more competitive again. They added Corsair Link support and put extra filter caps in the cables… just like the current high-end EVGA units. But Corsair Link adds cost, so I still see people spouting off about how the RMi units are poor value compared to competing units that don’t have software monitoring and then using that as an entry point to spiral off from there and start bashing the performance. Even though the RMi units offer EXCELLENT performance. You and I have seen firsthand proof of that.

It all goes back to what I’ve ranted about before. A company is successful for too long in this business, and suddenly certain people think they’re the success police. Oh, we can’t have a company getting too popular, can we? We’ll just have to tear them down now and build up a new company to tear down later, won’t we? I’ve seen it happen so many times before that it got old for me years ago. Enermax, Antec, OCZ, PC Power and Cooling… none of these guys really made it to the top of the heap until the success police tried to bring them down. It just irritates the heck out of me.

Anyway… Corsair’s latest answer to the success police is the RMx line. Basically, it’s the RMi series without the software monitoring, which should cut down the asking price. Will this line finally make people sit up and say, “you know what? These are pretty decent units, and actually pretty competitive.” Maybe. I hope so if the performance stays in line with the RMi units. It probably won’t stop the more hardcore anti-fanboys out there, because they have to have some big target to attack and Corsair’s success in the power supply business makes for a big target indeed.

But enough ranting. I have a power supply to test, just to make sure the performance of this new RMx line is still where it should be if Corsair really wants to remain competitive.

As this is an update to the RM series, it stands to reason that most of the features would stay the same. 80 Plus Gold, semi-fanless operation, fully modular… all of that remains the same. CWT is still the OEM for the unit, so we’ll have to check things out on page five to see if the build quality is remaining high.

Quiet, efficient operation is the main selling point for these units, and the box is only too happy to remind you of it right here. Of course, the semi-fanless operation goes a long way to helping out with that. I’ll be showing you in the load testing charts where the unit runs fanless, so you can get some idea just how quiet this unit stays for how long, but remember folks… due to the fans in the load testers, I am not able to do any noise level testing. It’s just not possible with the gear I use.

On this side of the box, we get some graphics that tell us all about the connectors. Now, I zinged the HX1000i back in the day for coming with way too many Molex connectors vs. SATA connectors. It came with twelve of each. This unit actually takes away one of those SATA connectors, so now we have fewer SATA than Molex. Why? What could possibly be the logic in throwing in this many Molexes?

Not going to lie, I might make that same point deduction this time out. Or, I might not. I have a few pages left to decide that. A 1kW unit really has no need for twelve Molexes, but eleven SATA connectors is not a bad number. There’s no law saying you have to use all those Molex cables, is there?

Moving on, the box would like to remind us that this unit is 80 Plus Gold, has all Japanese capacitors (likely not made IN Japan, mind you), runs semi-fanless, and has good prospects for long life. I’m tired of seeing the box, so I’ll toss it away and show you the contents now.

We have a bag of modular cables, a power supply in a bag, a warranty guide, a user guide, a power cord, and a bag of goodies.

Within said goody bag, we find a pile of zip ties, a case sticker, and some black screws.

The user guide is massive, printed in multiple languages, and rather good. It doesn’t have any operating temp specs in it, but that’s ok… the spec sheet download available at the Corsair site has that information. These units are good for full power at fifty degrees.