Question Fan speed high until I turn on CAM

[tenrudy]

Hey, just built my new PC. I am using a Gigabyte aorus pro wifi z390, i9900kf, EVGA 2080ti black, Kraken x62. When I start the PC all the case and radiator fans run high UNTIL I OPEN UP THE CAM NZXT program--then they slow down and get quiet until I open up a window(internet etc) then they run fast again. All of my case fans(2 case and 2 radiator) are attached to the kraken x62 fan extensions--and the Kraken is attached with USB to mobo and attached to the CPU fan header on Mobo. To control the fan speeds based on work load should I attach them to the Mobo fan headers instead and control through Bios/smart fan? Or there a more simple fix?

 

[LordVile]

Hey, just built my new PC. I am using a Gigabyte aorus pro wifi z390, i9900kf, EVGA 2080ti black, Kraken x62. When I start the PC all the case and radiator fans run high UNTIL I OPEN UP THE CAM NZXT program--then they slow down and get quiet until I open up a window(internet etc) then they run fast again. All of my case fans(2 case and 2 radiator) are attached to the kraken x62 fan extensions--and the Kraken is attached with USB to mobo and attached to the CPU fan header on Mobo. To control the fan speeds based on work load should I attach them to the Mobo fan headers instead and control through Bios/smart fan? Or there a more simple fix?

You can set them in CAM or the BIOS. I have mine in CAM as I'm using the controller built into my case, they ramp up to max when I hit the desktop but go to my settings when CAM loads up.

 

[Paperdoc]

First of all, the Kraken X62 system was intended to control its own radiator fans to regulate CPU chip cooling, but NOT to control the case ventilation fans. A mobo always has at least TWO different cooling control systems. ONE concentrates solely on the CPU chip and uses a temperature sensor built into that chip by its maker to guide it. The Kraken X62 system grabs that temperature readout for its CPU cooling info. The rad fans are totally under control of the Kraken system. It is designed so that, IF it gets NO instructions from the CAM software via the cable connection to a mobo USB2 header, by default it will run the fans at full speed to be sure you get enough (more likely more than enough) cooling of the CPU. Only when the CAM software tool is started does it issue instructions to slow down the rad fans to what is really needed.

Now, it happens that you have also placed both your case ventilation fans under the same control system because you plugged them into the Kraken system. What you really should have done for those two case fans is plug them into your mobo's SYS_FANn headers. These normally use a different temperature sensor built into the mobo as their guide, so they will do slightly different things than the rad fans. Also, connected this way, they will NOT depend on the CAM software; they will be under control of an automatic system built into your mobo. Just to be sure, when you re-connect them to SYS_FAN headers, go into BIOS Setup and see your mobo manual, p. 32, about Smart Fan 5 Settings. Be sure to select the particular SYS_FAN header you have plugged into (don't forget to check BOTH of them) and check the item Fan Control Use Temperature Input. It should be set to the general motherboard temp sensor, not the one inside the CPU chip.