We've just released an update with fan clock and voltage control for Windows.
Download it here:
http://www.turbominer.com/downloads/turbominer-antalya-1.1.18.zipUse any or all of the following example commands in the settings.dat file:
fan_speed=(0-255)
core_clock=1175
memory_clock=2000
core_voltage=925
You can also control per card by using the commands after a device=n command, where n is the card number as shown during startup.