i had a 680i A1...Nosboost300 has it now.
i also had it stable up to 3.6Ghz and i ran it through various benchmarks at 4.0-4.1 with a tuniq for cooling.
I also used the P30 BIOS as they are currenty the best for overclocking a quad. you may need to upgrade to that version to get a better/stable OC
heres my settings i used for 3.2Ghz and DDR2-800 Crucial Ballistix ram