Hum...1.3? That's it? You don't use the OverVoltage tool? Mine wouldn't go very high at 1.3V...you still have a of head room with that temp. Your motherboard should have an OverVoltage tool (should be similar to mine) where you can pump +.1, +.2, and +.3. That should give you more room to OC. To change the freq. just type the number in when the freq. is highlighted and hit enter.
Btw, 3.3GHz @ 1.3V = nice chip.