The lowest voltage at which it'll run stable for a given frequency is the voltage you want. Means less power and less heat.
great, lower voltage it is !!!
The colder you can keep it, the better. I'd shoot for keeping it under 70C.
70C where at ? the heatsink ? any particular spot we should check temps at with a laser gun ?
about the newpacs (at 350 freq) I am checking heatsink (31C) and the two chips on the back (49C) are temps too high or too "low" ? can I increase freq while staying in a 'safe zone' ?