ASUS Maximus Formula SE

[devilhood]

Yeah, it seems 400x9 has been the sweet spot for my x6800. Anything higher on a 9 multiplier takes a crap load of voltage, even 415x9, and I don't want to drop down to an 8 multi. I've been able to hit this mark on every board I've owned so far.
I'm just looking to increase bandwidth and tweak the timmings more on my RAM. I should have my new Mushkin's tomorrow so, hopefully, I'll be able to hit 1150-1200MHz w/ reasonable timmings.

I'm not sure if this will help with your Mushkin, but it might, so to give you a rough guide, my Crucial Ballistix DDR2-1066 was able to hit:

Primary Info : 4-4-4-9-3-25-5-3
Secondary Info: 7-3-5-4-5-4-5

DRAM voltage was at 2.16v, max rated voltage for the ram is 2.2v but it can cope with 2.3v max 24/7 if you have at least one fan on your side panel cooling the ambient temps.
If I run it a 2.3v I can bring it down to 4-4-4-8-3-20-5-3, but I don't think it is entirely 100% stable, might need a tiny tiny bit more voltage, not going to risk it though, the board overvolts it enough for me to worry.