I have a Gigabyte MZ32-AR0 REV 3.0 (latest BMC Firmware 12.61.35, latest BIOS M23_R40), and all fans are always at full blast. There is no rpm sensor readings for any fan. Fan profiles in Gigabyte Management Console have no effect and only list 4 mysterious fans (BPB_FAN_1A, BPB_FAN_2A, BPB_FAN_3A, BPB_FAN_4A) similarly to what is shown in page page 109 of the user guide for Gigabyte Management Console ( server_manual_mgt_console_user_guide_ami_v1.x.pdf ).
The user manual for MZ32-AR0 revision 3.0 ( server_manual_MZ32-AR0_e_v3.0.pdf ) actually shows in page 19 that this MB has 6 fans (CPU0_FAN, SYS_FAN1, SYS_FAN2, SYS_FAN3, SYS_FAN4, SYS_FAN5).
I found that the user manual for MZ32-AR0 revision 1.0 ( server_manual_MZ32-AR0_e_v10.pdf ) shows in page 90 that they had Fan Control settings in BIOS, but it was removed for the newer revision 3.0.
Does anyone here have the same motherboard and is able to control the fans?