Precision isn't going to recognize your ftw3 card as a ftw3 hybrid card as your current card doesn't have the hybrid vbios loaded to it. I bet your driver crashed and recovered when the screen froze.
When the graphics driver crashes & recovers during a 3d load clocks will get locked to a lower value until you close the 3d app & let the card return to idle clocks (139/405). Sometimes you'll need to reboot the machine to restore normal clocks.
A unstable overclock can cause the screen to freeze up & the driver to crash & recover. +60 seems to be too high of an overclock for your card. Start with +20 and work your way up in +20 increments.