Nice CPU - 1,66V for 6600 32M and it took really 1,76V for 6700 1M? Or was this run just set and go without voltage tweaking?

1.76V is more than enough i think.

We tried to reduce the CB, so we added more volt to heat it up, for more easier temp control.

Acturally we didn't get the optimzed volt for it.

Longshot, but was this CPU from batch 3313 as displayed? Never seen Costa Rica this strong...