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Corsair RMx Series, RM1000x, 1000W, Fully Modular Power Supply, 80+ Gold Certified
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- 80 PLUS Gold certified: High efficiency operation for less excess heat and lower operating costs
- 100% All Japanese 105 capacitors: Premium internal components ensure solid power delivery and long term reliability
- Zero RPM Fan Mode: Virtually silent operation at low and medium loads. 6th generation Intel Core processor Ready (Intel Skylake and Z170 motherboards)ATX12V v2.4 and EPS 2.92 standards and is backward compatible with ATX12V 2.2, 2.31 and ATX12V 2.01 systems
- Fully Modular: Make your builds and upgrades easy, with clean, great-looking results
- Ten year warranty: Your guarantee of reliable operation that will last across several system builds
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Gold-Certified Efficiency and Tight Voltage Regulation for Superior Performance
Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified efficiency, and a fully modular cable set. Built with all Japanese 105°C capacitors, they’re a great choice for high performance PCs where reliability is essential. 80 PLUS Gold efficiency reduces operating cost and excess heat, and Zero RPM fan mode ensures virtual silence at low and medium loads. And, the fully modular DC cables make builds and upgrades easy, with clean, great-looking results.
80 PLUS Gold Certified
Gold certification ensures high efficiency operation for less excess heat and lower operating costs.
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Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified efficiency, and a fully modular cable set. Built with all Japanese 105 Degree C capacitors, they're a great choice for high performance PCs where reliability is essential. 80 PLUS Gold efficiency reduces operating cost and excess heat, and Zero RPM fan mode ensures virtual silence at low and medium loads. And, the fully modular DC cables make builds and upgrades easy, with clean, great-looking results. Customer Service / Tech support: 1-888-222-4346 opt. 1
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However, in my case, it wasn't lying. The last time I got that message, it rendered my Asus GTX780 useless. Now I get huge graphical glitches everywhere from the POST screen, to BIOS, and booting an OS isn't possible.
Since this was after Amazon's 30 day return period, I have to return it to Corsair directly. I tried registering on their customer portal at corsair.force.com, like the Corsair rep tells people to do here in the review section of Amazon, but their activation email never came. It's not in junk or spam, it just never came to my GMail-hosted account.
So here I am, out of a $140 supply that likely fried my $500 graphics card.
- Fully modular
- Nice cables
- Looks nice if you don't have a power supply shroud in your case
- See above.
UPDATE: I want to applaud Corsair for their support & RMA process. The email did eventually come, I believe it took a couple hours. I was quickly given instructions on how to send the unit back and they sent me a sealed completely new PSU in return. I expected maybe a refurb unit, but they sent me a brand new one instead which is a good gesture. They're a good brand, I still use their RAM and I have a Corsair SSD that's still going strong 4 years later... but I just happened to lose the PSU lottery with this one, I guess.
Also, I bought it on Newegg because it was on sale for $170, so it won't show up as a "verified purchase" on the Amazon review page. But don't worry, I have plenty of pictures below.
My system is as follows:
Intel Core i7-3930K at 4.5GHz (1.375V)
2x GeForce GTX 780 Ti reference cards at 1.2GHz (at stock voltage)
Corsair Hydro Series H80i w/ Noctua iPPC NF-F12 2000RPM PWM, mounted as rear exhaust
2 SSDs, no mechanical drives
Fractal Design Define R3 case, with two 120mm Silent Series 1200RPM fans (the ones included with the case) as front intakes.
The system requires about 700-750W output from the power supply at peak gaming load (note: power supply ratings are in output wattage, so if you measure power draw from the wall you will need to factor in efficiency to calculate the actual power usage of your system. The figures above take this into account and reflect the power output required by the system, not the power measured from the wall).
This Corsair RM1000i power supply is a replacement for my previous SeaSonic Platinum 860W (SS-860XP3) which consistently failed when trying to deliver above ~650W output, which in itself was a replacement for my SeaSonic Platinum 660W (SS-660XP2) which consistently failed when trying to deliver above ~450W output. These numbers are according to my Kill-a-Watt, anyway. It occurred to me the Kill-a-Watt could be giving false readings, so one of the first things I did with the RM1000i was compare the Corsair Link measurements to the Kill-a-Watt. They agree within 10W of each other in every circumstance. Since I live in a very hot environment and there isn't much airflow in my case, it's possible I'm triggering a temperature threshold or something on the SeaSonics (rather than a straight overload) so it's possible they're not actually defective, but since they don't have Corsair Link or any other way of monitoring temperatures or determining which safety cutoff was triggered, I don't know for certain. Either way the fact still remains that the RM1000i is able to handle my system. The SeaSonics couldn't.
It performs well. Not much else I can say. I haven't experienced any shutdowns under maximum load like with my SeaSonics. I don't have any actual PSU testing equipment, so I can't actually confirm it goes all the way to 1000W output, but I can at least verify it can deliver 700-750W without a problem, for what it's worth. The efficiency, according to Corsair Link, hovers above 90-92% pretty much all the time. Not bad at all.
NOISE AND FAN BEHAVIOUR
This power supply is quiet. Very quiet. You can hold down the "fan test" button to spin the fan at 500RPM, and even with the rest of the system powered down completely the fan is almost inaudible with my ear right next to it. In actual usage the fan stays off under idle and any normal desktop scenario. When under a higher load, the fan immediately spins up to 700RPM, but I've never seen it go above 750RPM even after a half hour of Crysis 3 pulling 700-750W from the unit. Of course, with two reference graphics cards in the system I'm not exactly in the best position to judge whether the PSU is quiet or not, but like I said at 500RPM it's almost inaudible in a powered-down system, and 700RPM isn't going to be much more noise than that, and it seems like it will take a pretty insane load to make it even spin up past 700RPM. My Noctua fan adds more noise to the system than this PSU.
As for coil whine and other electrical noise, I haven't heard any and I have a pretty keen ear for that kind of stuff. Keep in mind though that the presence of coil whine is on a unit-by-unit basis, so as always there is no guarantee that your own will be coil-whine-free. This goes for any power supply.
It might be nice to have a permanent on switch for the fan like my SeaSonic has, in case you don't care about zero-RPM mode and would rather just keep temperatures lower, that would be a nice option. The thing idles near 48-50C in my climate, though drops to about 42-43C under load since the fan spins up.
The fit and finish of the power supply is excellent, it feels and looks solid. Nice beefy power switch. Even the labels are high quality, nice matte hard-plastic printed labels, none of that cheap glossy paper sticker stuff. The PCB for the modular connections doesn't flex at all when I plug cables into the power supply. On my SeaSonics on the other hand I did notice a little bit of flex on the modular connections. Not that it's an indication of bad quality, but I think it does say something about the outstanding quality of this PSU. Like I said, I don't have PSU testing equipment and I also don't want to void my warranty, so if you want details about the internal components used, and load tests with numbers for voltage regulation, ripple, and all that, you'll have to wait for a professional review from JonnyGURU or someone like that.
PACKAGING AND MANUAL
The packaging is quite good. Corsair took a page from SeaSonic's book with the velvet-y bag for the PSU, kind of overdone in my opinion but I guess I can't really complain. Good soft foam packaging. Nice quality nylon bag for the included cables. Even a free pack of silica gel!
Also includes 10 black zip ties, four Phillips-drive hex-head case screws, and a metal (!) case badge. Very nice.
The manual leaves a lot to be desired though. It does give you a rundown of the included cables and their length, an electrical spec chart, and efficiency and fan noise curves, but there's a lot that could be improved here. The power supply comes with a "Corsair Link USB Cable" and a "Corsair Link Digital Interface" cable, and doesn't explain anything about them. The USB cable is fairly self-explanatory, plug it into the PSU's mini-USB port and into a USB 2.0 header on the motherboard to get Corsair Link functionality, but that leaves me wondering what the "Corsair Link Digital Interface" cable is for, and the manual doesn't say a single word on the topic. Right now it's still sitting in the bag, Corsair Link is working fine without it so it doesn't appear to be necessary.
There's also a little unlabeled LED on the back of the PSU (it's pretty dim, don't worry) which is sometimes flat green, and sometimes flashes between orange and green. What does it indicate, you ask? Couldn't tell you. The manual doesn't mention a thing about it. Maybe it's just me but it doesn't really make sense to have an indicator LED if you don't say what it indicates.
The manual looks pretty thick, but it's literally only two pages. This is the entire manual right here:
Then there are two more pages for the RM850i, two more for the RM750i, then the RM650i, then a bunch of other languages. That's the whole manual.
I have a TON of nitpicking to do here, lol. If you're one of those people who says "well who cares about looks?" Well, obviously Corsair does. Otherwise they wouldn't go through the effort to have all-black cables (except one, which I'll get to), or put sleeving on them, or have a nice clean black exterior, include black screws, or slant the corners of the power supply instead of making it a regular black box. Hell, even the PCB inside the power supply is black, which is a level of attention to detail that impresses me. So, Corsair cares about looks, and plenty of their customers do, so I'm going to write my thoughts on it if only for their benefit. If you don't care about looks then feel free to stop reading at any time, the meat of the review is over at this point.
Anyway; the exterior of the power supply is very clean looking as I said. Both sides are identical (but flipped) so the visible side and label always looks the same no matter which way you orient the unit, which is good since the side is generally the most noticeable face of the PSU. The "spec" chart is on the bottom side (opposite from the fan) which unfortunately doesn't look so great when the PSU is mounted fan-down, but there's not much Corsair can do about it since that chart does have to go somewhere.
I do love the white-themed logo on the side, it's much better than the yellow it replaces and I've always been an advocate of neutral colors or multiple color options rather than having one color specific to each line (looking at you, motherboard industry), steering you in directions you might not want to go. For example if I had a green NVIDIA-themed build, my only Corsair choices would have been from the CX series or their other entry-level power supplies, or if I was building a budget PC but liked red-and-black, my only Corsair PSU choices would be super high-end AX-series units. This kind of choice-limiting is irritating for an enthusiast (though of course if you don't care about color it's not a problem, but some people DO care about color). White is neutral, so it's much more flexible in this regard. As it happens, my build is all black and white, so this fits in quite nicely and I was delighted when I saw it had just launched when I was looking into replacing my SeaSonic. It's about time Corsair had a neutral colored PSU on sale. Speaking of the label, the "RM" lettering is actually sort of a satin silver, while the "1000i" is white like the other parts of the label. Just thought I'd mention it, since it doesn't really show up well in pictures.
The cables I'm not as impressed with. They're not bad by any means, they're really quite good and there are plenty of them provided, no major problems here, but of course I have some minor gripes and nitpicks.
The cables are all black which is almost good, except that there's one cable that isn't. That would be the mini USB to internal USB 2.0 header cable, used for Corsair Link. It's jacketed, so you don't see any color until the end, but the last centimeter or so on the internal header side breaks out into five color-coded cables for USB, not exactly a pretty sight.
The cable also unnecessarily takes up both ports on the USB header even though it's only one device, and having multiple Corsair Link devices eats headers quickly. I have an H80i and the RM1000i as well as a case with dual 2.0 ports on the front like 99% of other cases including almost all Corsair cases. That's three USB 2.0 headers required. Most modern boards only have two or even one header, even high end boards like the Maximus VII Hero, Sabertooth Z97, etc. Three headers is actually fairly uncommon now, so it'd be nice if Corsair Link took only one row on the header, so two Corsair Link devices could be attached per port.
I mean, the top row of the header isn't even WIRED for goodness' sake.
The main 24-pin, CPU, and PCIe cables are also sleeved, though I must say I'm not a huge fan of plastic sleeving like the sort used here. The particular sheen on the sleeving here when light reflects off of it just screams "plastic", when you touch it it definitely feels like plastic, and if there was any doubt you can run your fingernail across it and listen to that nice plasticky rattling. Blech. If you're going to sleeve, use paracord or some other kind of actual fabric, though I'm aware that's a pretty unreasonable thing to ask of stock cables, and I don't really expect or demand it. But I wish they wouldn't substitute plastic sleeving for it instead, honestly I'd rather stick with the flat black ribbon cables over plastic sleeving. Though, that's a matter of opinion of course. I could just cut the sleeving but again I suspect that would void the warranty.
The heatshrink is also waaaaaay too long:
It looks ridiculous and genuinely gets in the way of cable management since the cables don't really bend where the heatshrink is, and in this case that's a HUGE length of the cable. I had to route my 24-pin in a different way than usual because the ridiculous amount of heatshrink prevented me from bending it where I needed it to bend in order to fit through the cable management hole next to the 24-pin connection on the board. I could make a really fast bend right at the start of the connector, which looks ok...
...but sticks out through the back WAY too far for me to have any hope of getting the side panel to fit back on, because I can't bend the cable downwards until the ridiculous-length heatshrink ends.
It's kind of odd, because the PSU-side of all these connections have more reasonable heatshrink length, about the maximum I'd be willing to accept. But the device-side of these cables consistently have 2-3 times the heatshrink length of the PSU-side. Very strange.
Corsair also decided to switch from bunches of 6+2-pin cables to these interesting daisy-chained cables, where you have a 6+2-pin cable, with another 6-pin cable daisy-chained off of that, and then an extra 2-pin daisy-chained off of THAT to make it a 6+2-pin as well. Maybe a picture will explain it better:
I'm sure Corsair validated this approach for delivering 300W through this cable (maximum power draw of two 8-pins combined) so I don't care to speculate that ohh it won't be able to deliver as much power as separate cables blah blah blah. I do have two other complaints here though. The first is that, well, it's kinda ugly to me to gave the giant loop-back on both of my GPUs:
I understand why Corsair wanted to try this approach, no doubt it's to streamline the number of cables coming out of your power supply. It's kind of like SATA power cables, with 4 SATA connectors in each chain powered off a single plug on the PSU. If you have a lot of hard drives it'd be kind of ridiculous to plug them into the PSU with a separate cable for each drive.
Speaking of SATA chain cables, it gave me the idea to run the daisy-chains upward from the first to the second graphics card, instead of side-to-side along the one graphics card with a loop like before:
...but the cable length on the second connector is a fair bit too long to look any more decent than the giant loops, even with two slots of space between the GPUs. Also the way the second section exits out to the side of the connector seems to indicate Corsair intended the chains to run sideways anyway. A shame, because I think chaining the cables upward between both GPUs has a bit more potential for looking clean, and if they could shorten up that inbetween section of cable a bit it might look somewhat better when used that way. Right now, it doesn't look great either way you run them.
The second issue with the daisy-chained cables is that they seem rather susceptible to bad alignment between the first 6-pin and 2-pin which makes them difficult to use together. Normally when you have a 6+2 pin, the extra 2 ground pins are daisy-chained from the 6-pin, and loop back around to sit next to the 6-pin like this:
So there's no way you can have alignment problems with the 2-pin. The whole loop-back thing gives you flexibility to adjust and line it up that 2-pin just right. However, on these daisy-chained Corsair cables, while the second 6-pin has a standard 2-pin daisy-chain loop like that, the first 6-pin in the chain has a 2-pin that comes straight out of the sleeving as a separate cable. It's hard to explain, but basically it means you can get cables like this:
...which are essentially unusable. PSU cables aren't exactly stretchy, so if it doesn't go far enough it doesn't go far enough. If you get a cable like this, you're kinda out of luck. The PSU comes with four of these cables, and you can run up to an 8+8-pin GPU with each one. One of my cables you saw above, the 2-pin was too short. On another one the 2-pin was too long (although that's not too bad since bending just the 2-pin back a bit isn't nearly as difficult as bending back the 6-pin just a hair). On the last two, the 2-pin lined up reasonably well with the 6-pin, so those are the two I used.
It's also worth keeping in mind that most graphics cards have 6+8-pin or dual 6-pin for power, not that many cards have dual 8-pin. Unless you have one of those few, you can just use the first connector on the chain for the 6-pin, and use the second connector for the 8-pin or second 6-pin, and you won't have to worry about whether the extra 2-pin on the first connector lines up or not.
Still, it's something that Corsair may want to address in the future for this type of cable design.
There are three SATA power cables with four connectors on each one, about this far apart:
This seems a bit far apart to me, perhaps making them two drive bays apart would make more sense (well, two-ish, drive cages don't have a standard spacing as far as I'm aware).
Another issue I have is that all the SATA connectors are right-angled. All of them. Which might seem to make sense at first, since most drives are going to be at a right angle. But I must also point out that a lot of cases are starting to include SSD mounting points behind the motherboard tray. A straight SATA connector rather than angled would be much better in this situation for cable management, as a right-angled cable can be genuinely impossible to plug in if the top of the drive faces out. A right-angled cable would point directly at the motherboard tray, not good. And of course, straight SATA connectors would be helpful here:
What could that be, you ask? Well that's the mandatory power connector for my Corsair H80i. Seems even Corsair's own products would be better served with a straight SATA cable. My SeaSonics both had at least one straight SATA cable, so they were actually better in terms of the cable situation for hooking up my H80i. Here's what it looked like powered from my SeaSonic power supply:
Much better to manage.
Speaking of my SeaSonic cables, I wanted to cover one other topic, which is the compatibility of the SeaSonic cables. Some may recall a few older Corsair power supplies were manufactured by SeaSonic. These ones aren't, but since Corsair uses the same modular cables between their different power supplies I was curious if the SeaSonic cables were the same. I couldn't find any useful information on Google, just a bunch of no guarantees "we can't validate our modular cables for compatibility with other companies' PSUs, sorry" sort of stuff. So, I tried using the SeaSonic cables (on an older throwaway machine, obviously). The 8-pin PCIe and CPU cables actually have a slightly different keying, so those don't fit in at all. The main 24-pin and the 6-pin SATA and Molex cables actually have the exact same keying as the SeaSonic, so you can plug them in, but neither of them work either. Though, it didn't destroy any of the components, they all still worked fine once wired up properly again. But anyway, that settles that question.
And one last thing. The RM1000i's "warranty void if removed" sticker over one of the top screws sticks out like a sore thumb, even given a shot of the full system:
This isn't very difficult to change either, just stick it on the opposite corner screw next time, where it will be completely covered up by the case's expansion card overhang and out of sight.
That's pretty much the end of my review. I'm also going to leave a note about one other tiny little issue that bothers me though, juuuuust in case any Corsair designers read this.
I noticed that the top face of the power supply (the side with the fan) uses hex-drive screws, no doubt to make it more "industrial" looking. Phillips-drive screws do tend to give off a sort of "consumer-grade" vibe so I get where they're going with this. It seems to be a new trend among computer components, I can only guess hex screws are catching on now as an "industrial design element" because of NVIDIA's reference cooler which uses them extensively. Now AMD's new Fury X reference cooler uses them too, and now I see them on this power supply... Honestly it makes me roll my eyes, because while hex may be fine for furniture and exercise equipment, using them in the computer industry is the exact opposite of industrial-grade. I'm all for ditching Phillips drive, but at small sizes we deal with in computers hex is absolutely horrible, it's even worse than Phillips. Hex drive screws strip VERY easily at small sizes, even with the correct size driver, and I can attest to this after dealing with the hex screws on my own NVIDIA reference coolers when I disassembled them to paint them. Anyone serious about industrial-grade design at small sizes like this would be using Torx screws if they're not concerned about ditching the convenience of Phillips.
I mean, not that it really matters since I won't be touching those screws on this PSU (it voids the warranty if you take out the last one). But, I'm just saying. It doesn't give me a serious "industrial-grade feel" if that's what you were going for. Kinda the opposite. Feels kinda "pretend-industrial" if anything.
Anyway, nitpicking aside, this is quite a good power supply, and I do like it a lot. None of the minor things I mentioned are worth a star, even combined. It does what it's supposed to do, the Corsair Link functionality is nice, the quality is there, it's quiet, and it looks good. What more can you ask for? Besides all the small things I ranted about above, I mean. In any case, certainly deserving of a 5-star rating. If you're looking for a power supply, this is a good pick. Cheers!
Final glamour shot for those curious:
Now, not only does the unit perform great, it also looks fantastic, especially in a white themed build or one with RGB lighting. I like the individually sleeved white cables and the included cable combs(those suckers are so expensive to buy separate, for what they are). The Corsair website's production description gives you incorrect details about the number of included cables, but the picture is accurate. These are also very high quality cables, seems like a decently thick gauge wiring, and there are capacitors in some of the cables which help with stability, reliability and safety.
I'm a little upset that they didn't included branded Velcro wraps for the cables. Literally every other unit I've bought from other brands comes with them, and those units cost half as much as this. I did appreciate the solid emblem for your case(instead of the sticker that some others give), but I feel that at this price range, including 50 cents worth of velcro wraps should be a no brainer for customer satisfaction. At least they slapped a 10 year warranty on it though, this unit will be in at least 2 or 3 PCs during that time. Power cable to the wall is also very thick. Aside from not including the Velcro cable wraps, they didn't really cheap out on anything with this.
And as a note about overvolting and overclocking my CPU: it's been delidded, the TIM underneath replaced with liquid metal, then the IHS reseated. I'm a risk taker with no regards for my CPU's warranty(voided it within 5 minutes of opening the box haha!), your results may vary and you have to be sure to take the risks into consideration before doing anything outside of manufacturer recommendations.
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