Thanks. That doesn't actually solve my problem though, however Gigabyte have since given me the answer. Bascially, there were two problems: SYS_FAN1 supports 3 pin fans, but SYS_FAN2 and SYS_FAN3 can only control the speed of 4 pin fans, which I find rather odd. If you use a 3 pin fan in these heade...

Hi guys,
Did you manage to control the speed of system fans on sys_fan2 and sys_fan3? I've got this mobo - sys_fan1 and cpu_fan work fine and I can control the speed but sys_fan2&3 contantly run at 100% regardless of bios setting. I've got a call open with Gigabyte for this.

Gavin

Hi, thanks for your reply. I'm in dialogue with Gigabyte - it seems like a bug with the mobo because easytune only detects 1 sys fan as being controllable (see attached smart.jpg) whereas it quite clearly can SEE all 3 sys_fan headers because the speeds are being monitored (hwmonitor.jpg). In the BI...

Hi all, Just got new mobo (Gigabyte FA-F2A75-D3H) - I'm sure there's a firmware bug because fan control on CPU and SYS_FAN1 works fine, but I can't get any control over SYS_FAN2 and SYS_FAN3 connectors on mobo. I've reported this to Gigabyte. Anyway..... I'm using Speedfan (and have for years). It d...