Man! I haven't been following this post for some reason, but wow! what a rig! It looks like a pretty nice oc too. My setup is similar- not nearly as nice- I'm just using air, and a 8800 gts. What kind of ram are you using? is it ocz gold or platinum. You should be able to tighten the timings a little (the 680i seems to default them to 5-5-5-15 try 4-5-4-12) put the voltage to 2.1. With the new bios, memory is suppsoed to be more stable, so you might be able to bring it up to 830-850 MHz, but I don't think you can expect too much from that ram-- I'm surprised with your budget that you didn't grab some 8500 ram.