Looking at the system configuration, the server was shipped with 2 Intel Xeon E5-2689  V4 processors. These processors have additional thermal requirements and as such the fans' RPM will operate at 100% as a trade off. Based on this information, the fans are operating as required.
Hello, I have a brand new DELL R730.  Since the time i first booted the box, the fans start out at what I would consider a normal speed, halfway through boot, and then for as long as the box is on, the fans are loud and spinning at their max rate 100% or around 16000RPM.  There are 6 fans in this box. I have update the BIOS to the latest firmware 2.2.25, i have also updated the LifeCycleController firmware to the latest 2.40.40.40.   Dell technician's have been onsite twice to replace 1) the entire systemboard (mother board), and 2) one of the PCI riser cards (which had the intrusion button). The server's fans still spin 100%. I have done: - the flea power drain - the IPMI command to disable cooling for PCIe -remove all memory but 1 chip in A1 and removed the 8 SSD drives.  Still spinning at 100%.  When looking at the Fan's setup in iDRAC, i cannot even set a custom value as the range is stuck at 100-100%. There are no additional PCI or PCIe cards installed. Does anyone have a clue what is going on here.  It just doesnt seem normal that the fan's are spinning 100% all the time. 
DELL PowerEdge R730 (13th Gen) Fan's always 100% (16000RPM +)