The default voltage is 1.65.

To overclock to 210X12 I needed 1.925 v. I use a SP-97 heatsink and the socket temp at load was ~45, diode temp at load was about 53.

This chip is rated at 90c which is 5c more than the regular Barton. So it can handle higher temps.

Stable: All tests in Super Pi. Prime 95, 8+hours. 3DMark 2003, Sandra Burn-in tests.

BTW, my motherboard is a NF7-S revision 2.