I just finished building my first PC and I'm using a Corsair 4000 series case that came with three fans already connected together. My motherboard is an MSI B850 Tomahawk, which has a spec of 1 amp per system fan connection and there are six connectivity spots available. Each fan is rated at 0.4 amps. I've checked online and it seems that 1 amp per connection is pretty standard, but I find it strange that Corsair would bundle together three 0.4 amp fans.
I disconnected one of the fans and I'm considering ordering a harness extension for the other two. I'm curious if the motherboard monitors the current and RPM of the fans to ensure they don't exceed 1 amp. Should I separate the fans, or will the motherboard manage their speed to stay within limits?
3 Answers
Yeah, I’d say just leave them connected. Your motherboard should be able to manage the RPM and keep it under the limit. If you notice anything weird with temps or speeds, you can always change it up later.
Good question! The Corsair RS120 fans you mentioned are fine to run together. Your motherboard should handle the power distribution well, especially since it can monitor the current. As long as you're within the 1 amp limit, your system should be just fine even with the three fans connected. Just make sure to keep an eye on the BIOS for any alerts during startup.
I have the same motherboard and setup with seven case fans and three radiator fans. I daisy-chained a few to different SYS_FAN headers and they all work great. They’re recognized in the BIOS, too, and I can adjust their speeds accordingly without any problems.
Exactly, and if you're cautious, you could separate them just to be safe. But from what you've described, it sounds like they'll work perfectly together without any issues.