BFG 680i OC trouble - Need Help!

[TheGoat Eater]

First off old system specs (everyday runner)
P5B Deluxe/wifi-ap - BIOS 0711
Allendale E6400@ [email protected]
Scythe Infinity w/ Antec Tricool on High
G.Skill F2-6400PHU2-2GBHZ@525MHz 5-5-5-12
Silverstone Strider 600W PSU
7900GT @ 700/800

now on my 6400 I know it can do 500FSB as I did 7x500 on my old P5B Deluxe I was able to do 3.6 Orthos stable - now I got a new BFG 680i and trying to learn the BIOS. I can't do anything over 8x400, what am I to do - I can clock higher and it may go to windows load screen and load,load,load,load, you get the idea. then there are the times it will just post enough to say what the clock speed is - no more or less- and requires 2 restarts to get back into BIOS in safe mode.

Questions:
1. Anyone know of a good overclocking guide for the reference 680i boards like the one for the P5B deluxe ?
2.What do you think of my situation?
3.have you experienced this or know how to fix it?

Oh yes - BIOS is up to date

Thanks in advance