I only have XP with a crappy MB - no options for me. In Control Panel you could look in "Power Options" or "System and Security" or "Performance and Maintenance". There may not be a setting but you should look.
You did not answer any of the other questions. I may not be able to advise but others may.
You should read the MB manual concerning the fan connection to make sure you are doing things correctly. Go through the BIOS again looking for anything to do with fans. Read the BIOS manual.
I got the pdf
here but the manual you have may contain more information.
Here's an excerpt from the pdf, formatted to fit forum:
1.12.1 Hardware Monitoring and Fan Control
The features of the hardware monitoring and fan control include:
• Fan speed control controllers and sensors provided by the Hardware Monitoring and Fan Control ASIC
• Thermal sensors in the processor, 82X58 IOH, and 82801IJR ICH10R
• Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.1 V, and +VCCP) to detect levels above or below acceptable values
• Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or switch the fans on or off as needed
1.12.2 Fan Monitoring
Fan monitoring can be implemented using Intel® Desktop Control Center or third-party software.
For information about (The functions of the fan headers) Refer to
Section 1.13.2.2, page 33
...............
1.13.2.2 Fan Headers
The function/operation of the fan headers is as follows:
• The fans are on when the board is in the S0 or S1 state.
• The fans are off when the board is off or in the S3, S4, or S5 state.
• Each fan header is wired to a fan tachometer input of the hardware monitoring and fan control ASIC, except the fan header located at J7TH (item R on Figure 1, page 11)
• All fan headers support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed
• All fan headers have a +12 V DC connection
• 4-pin fan headers are controlled by Pulse Width Modulation
• 3-pin fan headers (front and rear) are modulated by voltage control
next table omitted cos it was too difficult to format