Upgrade Mac Pro 1.1 to 2.1 Firmware. AFTER THIS IS DONE DO A PRAM RESET AND THEN OSX WELL RE-REC BOTH YOUR CPU'S , IF YOU DON'T YOU WELL ONLY SEE 1 CPU .
'''How to Reset PRAM or NVRAM on a Mac'''
* Shut down your Mac.
* Press the power button.
* Before the grey screen appears, press the Command, Option, P, and R keys at the same time.
* Hold the keys until your computer restarts and you hear the startup sound a second time. ...
* Release the keys.