Connecting an RM Series PSU to Corsair Link


Because the RM series uses an analog signal to send information about the fan speed and +12V rail’s load to the “C-Link” connector on the unit’s modular interface, an optional Corsair Digital Bridge is required in order to convert the analog signal to a digital signal.

The Digital Bridge consists of two pieces. Connect the four pin connector to the “C-Link” port on the RM Series’ modular interface. 

The other half of the cable connects to the first with a 2-pin and 3-pin connector.

After connecting the two parts of the C-Link cable, take the entire assembly and plug the other end into any available internal USB port.

Within Link, you should see both “RM PSU 12V A Current”, which is the measurement of the +12V load on the power supply, and “RM PSU Fan”, which is the speed the fan within the power supply is spinning. These can be logged under the “options” tab as well.  The PSU fan speed can be graphed with the other fans in your system under the “graph” tab.

If another Link compatible power supply was in used prior to the installation of the RM Series unit, an incorrect reading may show up.  If this happens, simply delete the current profile, set to default and create a new profile.

If a USB port is unavailable, the RM power supply can plug into a Corsair Link Cooling Node.  Using only the first half of the cable, plug the 2-pin and 3-pin connectors into the Cooling Node as you would a temperature probe and fan connector. 

Since the signals are still analog, Link will see the +12V current measurement as a temperature.  Simply right click on the “temperature” being reported, select “open config panel” and change “temperature” to “12V Rail Current sense”.  It is suggested that you then rename the reading so it is easier to identify within Link.

Since the fan does not send a signal until it is spinning, it will not show up in Link initially if connected to the Cooling Node.  In order to initially position and name the RM’s fan in Link, you may want to run a benchmark or burn-in program like Furmark to get the fan moving.


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  • Deadmeat's gravatar Deadmeat said:
    9/24/2017 7:17 AM

    Thought I was done for, as I could not work out how Corsair link will work, ( I did not have a spare usb2 socket on the motherboard ) and also had no clue how that 4 pin analogue cable was to be used, Ok I then worked out that If I used my own mini usb to type A usb, (to a external usb port {for now as got a plan to fix that}). It works ! The PSU showed up in the link software straight away and was easily configured but Guys come on this page is from 2013 ! just update to show New USB configuration. I also suspect the Ren was sold an early RM650i as the USB has been part of the PSU since 2015, of course assuming that's a genuine review and not a troll

  • Ren's gravatar Ren said:
    9/19/2016 12:38 AM

    Corsair, before today I can truly say I was a huge fan of your company's products, but as of today I will NEVER buy another Corsair product because of your bait an switch policy with the RM650's "optional Corsair Digital Bridge". Had I known an extra cable was needed, BUT NOT INCLUDED, I never would have bought this power supply. One would think if you advertised said product as capable of doing something you would include items said product would need to accomplish the task, but apparently that's not Corsair's goal, apparently your goal is to maximize your bottom line... Well, I'm glad I found this out now before I WASTED more of my hard earned money on your products... I will be sure to tell ALL my friends in forums and person what type of a sleazy company you are... GOODBYE Corsair!.. VERY DISAPPOINTED.

  • Paweł's gravatar Paweł said:
    5/23/2016 12:40 AM

    Its possible connect c-link to SuperMicro X10SLL+-F mainboard to I2C PSMB ? RM750W -> c-link / I2c cable -> supermicro x10sll+-f I want moniotoring power consumption in vmware esxi 6.0

  • mike nistler's gravatar mike nistler said:
    5/8/2016 12:00 PM

    i got my corsair rm 1000 and the fan is not running +5vdc is running below 4.7 vdc how do i fix this or do i need a new psu. and i would like to be able to call and talk in person.

  • Ciprian Mitocariu's gravatar Ciprian Mitocariu said:
    2/24/2016 8:15 PM

    Dear Corsair, I both two months ago the Corsair 850RM power supply. I've received only the C-link cable without any Analog to Digital Bridge cable. Please be so kind and let me know from where can I purchase this. I have and use also the water cooler H80iGT from you, the Corsair Carbide Series Air 540 High Airflow ATX and all the fans are Corsair. Thank you.

  • krishna kumar's gravatar krishna kumar said:
    9/29/2015 10:48 AM

    hi sir I purchased corsair RM 850 but I don't get c link for corsair link how to get it please

  • miruniec's gravatar miruniec said:
    8/7/2015 7:35 AM

    all that is very useful, especially when one can not buy the "Corsair Digital Bridge" here in Poland. I will think twice about buying Corsair PSU equipped with some special additions next time ;(

  • Mojtaba's gravatar Mojtaba said:
    4/27/2015 11:09 PM

    Hi we need usb cable with bushing(strain Relief) . if you have standard and ready usb cable with bushing, please send me the specification of them , if not how can i order to build it for our company. i attached a similar file for you With Best Regards FaragirRFID co.

  • Alex's gravatar Alex said:
    4/5/2015 3:26 AM

    Why item is only available in US and Canada ?! Why you not ship to Europe ?!

  • Matias's gravatar Matias said:
    3/11/2015 5:15 PM

    how i am supposed to connect it to my motherboard if you didnt include the adapter. are you guys retarded or something?

  • marcus's gravatar marcus said:
    1/16/2015 12:32 PM

    não estou conseguindo mudar a rotação da minha fonte ela fica sempre em 0 rpm, mais só que estou querendo usar ela em uma velocidade fixa já baixei o corsair link mais la não aparece nem a temperatura da psu, e nem a velocidade ''-'' n sei mais o que fazer me ajudem

  • Dennis Koble's gravatar Dennis Koble said:
    12/9/2014 8:30 AM

    The box seems to indicate you supply the Corsair Link cable with the PSU although after much trouble I can now see you do not. This should be made clearer on the box and in the description of the unit. Also tried to open a customer support ticket and it simply would not allow me to proceed without a valid part number. I tried RM850, RM-850, and 850 as a part number but it would not recognize any of them and your product part number locater did not seem to know that you sold a RM850 either. This needs to be fixed. Also where the heck is the customer support phone number? It seemed to indicate you offered chat and telephone support but I could not locate it anywhere on the page.

  • Mark's gravatar Mark said:
    12/8/2014 7:09 AM

    Very bad marketing move. You release the RM PSU series in Europe, but cannot buy the Analogue to Digital Converter anywhere!

  • sorrii's gravatar sorrii said:
    11/28/2014 5:47 AM

    Wery strange that Link-cable doesn't include with the PSU ?!? I bought RM650 and paid 50€ more than practically as good CM G650M I think i'll return that shit to seller ...

  • 's gravatar said:
    10/9/2014 7:21 AM

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