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Corsair RMi and RMx series explained

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post #1 of 30 (permalink) Old 07-30-2015, 03:42 PM - Thread Starter
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The new RMi series from Corsair is a bit strange and confusing for some so i am going to make a thread that explains everything so there wont be anyone that misunderstand.

The first one is the name itself RMi and the newer RMx, anyone not knowing any better will just think this is the old RM with a new name or an improved version or something.
You would be very wrong to assume any of this so i am going to make it as clear as i cant so there wont be anyone that will misunderstand, the RMi and RMx series have nothing zero nada zip zilt to do with the old RM series.

It is in fact quite surprisingly a modified / upgraded / improved version of the older Corsair HXi series just with downgraded efficiency.
Wait what would you might be thinking thats pretty strange and yes i agree.

So i am going to compare the two and show you how its been improved and why you should get the RMi instead of the HXi. I am going to compare the 1000 watt version of the RMi and the HXi as thats the only wattage techpowerup has a review of both of (Click to show)
HXi



RMi



Looks pretty much the same
Quote from techpowerup about the RMi

This is actually a HX1000i with some component changes that lowered efficiency a tad while boosting performance everywhere else. The RM1000i, for example, not only uses exclusive Japanese capacitors and has much larger bulk capacitors (1150uF combined capacity vs 940uF of the HX1000i), which will significant increase hold-up time. We don't know the actual reasons behind these changes, but Corsair made a point of further improving the platform in some rather crucial areas, which is very strange considering the RMi line is situated below the HXi series.
Lets move on to voltage regulation (Click to show)
HXi 12v rail


RMi 12v rail


About twice as good voltage regulation on the 12v rail on the RMi compared to the HXi

HXi 5v rail


RMi 5v rail


HXi 3,3v rail


RMi 3,3v rail


Again the RMi is far superior to the older HXi series on the 5v and 3,3v rails
Next up is ripple (Click to show)
HXi


RMi


Agian the RMi proves its better with lower ripple on the 12v rail

Another thing i like to talk about is the fact that the cables on the RMI / RMx series are new and Corsair calls these cables type 4 and the reason for that is the fact that the 24 pin cable is new and WILL not work with the older type 3 cables.
This means that the type 3 aftermarket cables that Corsair sells WILL NOT! work with the 24 pin on the RMi / RMx the reason for this is the RMi / RMx uses a new 28 pin cable at the PSU end so type 3 and 4 cable wont work with each other.
Another thing about the type 4 cables is the fact that the type cables has built in caps to further lower the ripple suppression (Click to show)




If you remove these caps or replace the type 4 Corsair cables the ripple suppression WILL go up (15-35mv) so please dont remove them or use type 3 cables on the RMi / RMx it will make your PSU worse.

The last thing i want to point that many might be thinking is well the HXi 80 plus platinum rated and the RMi / RMx series are only 80 plus gold rated so the HXi must be better right?, well wrong again as 80 plus has jack to do with quality rated output stability or anything its an efficiency rating system nothing more.

80 plus is pretty much irrelevant so with that in mind there is no reason for you to buy a Corsair HXi at all its rather pointless now as the RMi / RMx is not only better its cheaper as well.

Anyone with a working brain can figure out there is no reason to pay more for something that is worse so with that in mind i am going to say that if you want a Corsair unit despite the fact that the EVGA SuperNova G2 and P2 series are about as good and about the same price at least get the RMi or RMx instead of the HXi.

My opinion is the RMi / RMx series are the superior series compared to the HXi series despite the lower efficiency.

Corsair RMx explained

The brand new RMx series is the same PSU as the Corsair RMi just with all Corsair link removed so the price can be lowered, other then that they are pretty much the same series.

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post #2 of 30 (permalink) Old 07-31-2015, 08:19 AM
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Yup, thank you for explaining all this. It is FAR from obvious as the marketing spin would have you believe that the more expensive HXi series is better, when it is fact is only better in one specific respect: power efficiency at the test points. (And maybe also arguably noise as the fans are 140mm fluid bearings rather than 135mm in the RXi series). But as @shika summaries from the techpowerup data the RXi has better electrical stability performance. If you are overclocking this might help you get better results. And the price differential is large.

It might be worth pointing out that both these series of fans is relatively quiet with fluid bearings, large fans and automatic fan control settings which help control PSU noise. They've also put more effort into winding coils accurately - according to their marketing spin - in an effort to reduce chances of coil whine.

Thanks to shika's feedback on another thread I am most likely to opt for an RX1000i.
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post #3 of 30 (permalink) Old 07-31-2015, 09:02 AM - Thread Starter
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There is no RXi series you mean RMi i assume.

As for the RM1000i why? the EVGA SuperNova G2/P2 are better and cheaper and not much louder.
And do you even need 1000 watts? what are you going to have in that system?

Have we talked before? sory i cant recall if we have or not.


Edit: Sory never mind i recall now you did not want the G2 1000 watt as it has no hybrid fan mode and the P2 cost $20 more then the RMi

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post #4 of 30 (permalink) Old 07-31-2015, 09:14 AM
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Quote:
Originally Posted by shilka View Post

There is no RXi series you mean RMi i assume.

As for the RM1000i why? the EVGA SuperNova G2/P2 are better and cheaper and not much louder.
And do you even need 1000 watts? what are you going to have in that system?

Have we talked before? sory i cant recall if we have or not.
Quote:
Originally Posted by shilka View Post

There is no RXi series you mean RMi i assume.

As for the RM1000i why? the EVGA SuperNova G2/P2 are better and cheaper and not much louder.
And do you even need 1000 watts? what are you going to have in that system?

Have we talked before? sory i cant recall if we have or not.


Edit: Sory never mind i recall now you did not want the G2 as it has no hybrid fan mode and the P2 cost $20 more then the RMi

We have. (HERE). You were very helpful, thank you.

While you are there, could you help me a bit more on cable choices? I am looking to create my own custom length, custom sleeved cables. Here in the UK I can't find 16 AWG wire from the usual OCN sources (such as E22 who has 18 AWG and 22 AWG, but not 16 AWG which I want for the ATX and GPU cables). Instead there is a professional electrical supply store that I can use (RS-Online). A bit of a search yielded this choice. Which is most suitable from these specifications, and why? Thank you!

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post #5 of 30 (permalink) Old 07-31-2015, 09:20 AM - Thread Starter
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I not the one you should ask about that.

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post #6 of 30 (permalink) Old 07-31-2015, 09:20 AM
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OK
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post #7 of 30 (permalink) Old 08-18-2015, 11:43 AM - Thread Starter
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Seems like the cables on the Coirsair RMi are new so i have added some details about these new cables in the OP.

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post #8 of 30 (permalink) Old 08-27-2015, 01:21 AM
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For people interested in doing their own custom cables for the RM1000i I have done the work on the pinout schematics. The information is available to share with you all on LutroO's pinout thread here: https://www.overclock.net/t/1420796/repository-of-power-supply-pin-outs/560#post_24346238
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post #9 of 30 (permalink) Old 09-21-2015, 06:50 AM
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Corsair RM650i review.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=445

CHEERS..

It can run Crysis..
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post #10 of 30 (permalink) Old 09-21-2015, 07:08 AM - Thread Starter
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At least it has 4x PCI-E cables and have not made the HX650 mistake again.
But again its $20-30 overpriced.

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