Now in your software update.....

Mac Pro SMC Firmware Update 1.1

"Mac Pro SMC Firmware Update 1.1 adjusts fan behavior in the Mac Pro.

After this update has completed successfully, your SMC Version will be:
1.7f10 (Mac Pro)
1.5f3 (Mac Pro 8-core)
...
Note:
This update requires a Macintosh formatted disk or partition. If you are starting up using a RAID (Redundant Array of Independent Disks) subsystem, you must attach a Macintosh formatted storage device to apply this update.
Some USB and FireWire devices may prevent firmware updates from installing correctly. If you are having trouble installing an update try disconnecting non-essential devices and use only an Apple branded keyboard, mouse and monitor."

You can also download it from Apple - Support - Downloads - Mac Pro SMC Firmware Update 1.1



Also, while not in your software update, this is also worth noting:


Boot Camp Beta 1.4

"Boot Camp 1.4 beta contains several updates and is intended for all new and previous Boot Camp beta users.

Boot Camp 1.4 beta includes:

* Support for keyboard backlighting (MacBook Pro only)
* Apple Remote pairing
* Updated graphics drivers
* Improved Boot Camp driver installer
* Improved international keyboard support
* Localization fixes
* Updated Windows Help for Boot Camp"


Grab it now from Apple - Boot Camp