Since you are using an Intel board in an approved and tested Intel chassis, i would be very leery of trying to change the SDRs,
However, i would recommend checking the system thermal readings and fan speeds under load where the fans have ramped up.
The fan speeds are tuned to be "Green" meaning the system is allowed to heat up to a pretty high temperature (usually 3 to 8 degrees below max) letting the fans run as slow as possible which saves electricity.
My first guess would be the fan ramp is in response to the CPU getting hot. (P1 Therm Margin < -8)
Most likely cause of this would be the heat sink is not seated correctly.
Also check the heat sink fins are alined with the direction of air flow (front to back, not left to right)
Dropping the fan speed without knowing what is the thermal sensor driving the fan ramp could damage the system if the driver is a card or SSD.
If the driver is the CPU, dropping the fan speed will result in the CPU throttling and your performance will suffer.