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Running 2 commander Cores in my commander pro via USB


classyyachtmaker
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What’s your motherboard series?  See the pinned thread below. It also generally applies to x470 boards with BIOS updates to make them x570 CPU compatible. 

https://forum.corsair.com/forums/topic/168270-usb-connectivity-issues-related-to-amd-500-series-chipsets-megathread/page/3/?tab=comments#comment-996520

 

 

Are you running 2 Commander Core devices and a Commander Pro?

Edited by c-attack
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For my motherboard I have a msi z590 pro wifi cec. I'm running 14 fans and I have 2 commander cores and one commander pro. The 2 commander cores each have 6 fans plugged into them and the cores are both plugged into the usb ports on the commander pro. The commander pro has 2 80mm fans plugged in and 4 rgb strips.

PXL_20210921_025911270.jpg

Edited by classyyachtmaker
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It’s possible there is to much going on through the 1 usb path. Those are literal  passthrough ports on the Commander Pro, so try disconnecting 1 of the Com Cores from it and see if the other then shows up. You might have to restart the Corsair Service in order to trigger a re-detect. 
 

You also could try connecting both Com Cores to the 2(?) internal board headers and leave the C-Pro disconnected for the moment. This should clarify if either Com Core has an issue, but I suspect the problem is too much hardware on one USB path. If they both work when connected directly, you probably need a powered usb hub like so many others. 
 

It is also possible to reduce the number of controllers by 1.  You need 1 Com Core to control the Elite AIO. You could then manage the rest with either another Com Core or the C-Pro and then a PWM repeater to help offload some of the speed control responsibilities. There is no reason for individual fan control within the banks of three. The push-pull on the side would be the obvious choice using 1 control header for 6 fans. That leaves 11 PWM headers for the remaining fans. 

Edited by c-attack
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After testing different usb configurations and other Corsair products I've come to the conclusion that my commander pro's usb passthrough isn't working.

I plugged in both cores to my motherboard usb headers, but the icue software doesn't detect the second core.

So It just looks like iCUE software doesn't recognize 2 commander cores. The work around was running  8 fans on the commander pro with splitters and then using a lighting node core for the rgb. 

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It should recognize 2. It may call them Commander Core and Commander Core(1), but the one with the pump wide cable attached will show as the AIO pump “face” and the other will show as the device main body that looks very much like the Commander Pro picture. 
 

There are others using two Com Cores strictly for easy dual RGB/PWM control. I have not heard of this coming up outside of the standard AMD issues. Probably time to reach out to Corsair Support as well, if you have not already. This is not common on Intel Z builds, but if this is a new board, make sure the chipset drivers have been installed. 
 

On the other hand, it seems you have extra hardware resources available and what you’ve done now is what I would have recommended in light of the strips that need a RGB channel. 

Edited by c-attack
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  • 6 months later...

So this post is old and unsure who will see it. I just went through this trying to run two commander cores (one with the LCD AIO and a commander core xt). I escalated this with Corsair. I have a MSI MPG Z690 Edge wifi ddr4 motherboard. So I only have 2 USB2 ports. I tried daisy chaining them, daisy chaining the AIO usb to the XT, all 3 USB connections to a powered NZXT usb2 hub. Corsair sent me a replacement Commander Core for the AIO. I swapped it out and I could only ever get one commander core to show up. So there was likely a hardware issue with the original commander core. 

So in saying all that. The solution that worked for me so I could actually control all the RGB and have all the fans show up is: commander core and lighting node plus the pmw hub for fan power. I have 10 QL fans. So six are connected to the commander core and 4 are on the lighting core node. I am using the USB 2 splitter for the AIO and the commander core. Everything works as it should now. 

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50 minutes ago, gunnlaugr said:

run two commander cores (one with the LCD AIO and a commander core xt).

This post is old and and you have added two more devices that did not exist at that time.  You are going to run into trouble trying to run any 3 or more of: Commander Core, Commander XT, or LCD top.  It is not a power issue but appears to be USB 2 bandwidth limited.  Whether it's 3 Commander XTs or any combination of three of the above, one device is likely to drop out.  There are several other users with similar issues in more current posts.  The only work around thus far has been to use a USB 2-> USB 3 adapter to take advantage of the wider channel and to avoid daisy chaining devices.  

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