High Fan Speed

I have a Supermicro X10SLM-F with Bios 2.0 and IPMI-Firmware 01.35. When I set the fan mode to "optimal" I get the following sensor outputs:

4 | CPU Temp | Temperature | 36.00 | C | 'OK'
71 | System Temp | Temperature | 29.00 | C | 'OK'
138 | Peripheral Temp | Temperature | 36.00 | C | 'OK'
205 | PCH Temp | Temperature | 49.00 | C | 'OK'
272 | P1-DIMMA1 Temp | Temperature | N/A | C | N/A
339 | P1-DIMMA2 Temp |...

High Fan Speed