Arfuritis Posted August 5, 2018 Share Posted August 5, 2018 Hi all, I have about 14 ML120s and 3 ML140s plugged into my 1000D's onboard commander using three generic PWM splitters. I'm not worried about obsessive micromanagement of each fan, but I need to be able to control and curve the RPM of ALL fans uniformly. I am trying to test whether performance profiles are actually being applied to the fans overall and... they're not. To test this, I created a profile called "Flatline" which just tells the fans "Run at max RPM independent of CPU temperature," and when I apply it, they continue running at a casual 1100-1600 rpm :sigh!: Does anybody know what may be the problem here? Can fan profiles be applied through PWM splitters? Or is there another issue? Link to comment Share on other sites More sharing options...
DevBiker Posted August 5, 2018 Share Posted August 5, 2018 First, I would strongly recommend that you limit it to 2-way splitters. We've seen issues with users on 3-way splitters and, with the number of fans that you are running, you may be well over the 4.5A total limit on fan power. Second, your seeing the max speed for the ML fans. Those fans simply won't go any faster than that and no amount of changing settings in the CoPro settings will change that. It'll run them just as fast as they are able to be run and no more. So ... there's no problem here with the CoPro, iCue or the fans. Link to comment Share on other sites More sharing options...
Arfuritis Posted August 5, 2018 Author Share Posted August 5, 2018 Thank you for the response! Can you elaborate a little bit on the fan power limit you mentioned? I'm not sure what the 4.5A limit you're referring to is - is that the total SATA power input? As for RPM, I thought they'd be rated a little bit higher :thinking: but on the bright side, at least they'll never get any louder than they are now! :biggrin: As a follow-up question, if the fan power distribution does get too taxed and they start "running lean," what will that look like? Start/stop, or just throttling to a lower speed? I'm trying to figure out if there's a way to circumvent that possibility, but there are only so many ways to power and RGB control 17 fans, especially since I'm already up to my neck in SATA plugs... Link to comment Share on other sites More sharing options...
DevBiker Posted August 6, 2018 Share Posted August 6, 2018 You have 4.5A for the 12V rail. Yes, that's a limitation of the SATA power connector. If the fan power gets to be too much, the CoPro's fan header tends to fail. After that, the fans don't spin. I can't say that this will definitely happen to you. What I can say is that we've seen this happen a lot from other users on the forum with 3-way splitters. One, in fact, just earlier today. The best thing to do is to get another CoPro, use some motherboard headers or have a powered fan hub (like one from Silverstone) that provides power to additional fans. Link to comment Share on other sites More sharing options...
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