Help in figuring out a GA-P43T-ES3G overclock settings

Ok, here's what I have:
Intel Quad Core Q9400 2.6GHZ
Gigabyte mobo GA-P43T-ES3G
G. Skill F3-10666 ram 4 ram sticks X 4 = 16 gb
Zalman CPNS9500 AT2 CPU cooler
ATI Radeon HD 5770 video card
600 W PSU

I have gotten my CPU overclocked stable at 3.4 GHZ with:
CPU Multiplier 8.5 (.5 from fine tuning) 1.275 Vcore in Bios (1.232 in CPU-Z)
FSB 400 MHZ,PCI 100 MHZ, MCH 400, 3:5 FSB/DRAM, SPD 3.33D, stock timing 9-9-9-25 108 2T, Prime95 runs 64 degrees after 10 minutes...

anything above this and it's unstable no matter what I try. I've upped the Vcore to 1.320v, NB to 1.4 and DRAM to 1.6 with no luck. it won't even post.

I have been able to get FSB 415 MHZ to work if I turn down the DRAM speed to 333 wiht 3.2B SPD. Any ideas on how I can keep this cpu clock speed and get my ram up to 666? No matter what the CPU is, if the Ram is set above 1333then it won't post.

thanks for the help!

you may not be able to push your ram much at all. I would go for a higher clock on the CPU then ram as performance will be much better. Keep temps on the cpu under 70C and u should be fine. Try a little more Vcore. Not sure if u have a PLL voltage too but keep it under 1.6V. Running high PLL will kill chips and also raise heat.

I'm not sure on the PLL yet. I'll check when I get home. Here's some of the data that I've collected so far:

CPU Multiplier 8.0 (max)
CPU Fine Tuner 0.5 Effective multiplier now 8.5
CPU Frequency 415 Mhz
415 X 8.5 = 3.52 Ghz cpu
FSB 1660 Mhz
Vcore 1.2750v set in Bios but CPU-Z says 1.232v @idle and 1.200v 100% load
MCH 333 Mhz System Memory Multiplier 3.20B DRAM 1328 Mhz
MCH core voltage 1.4v(stock 1.1v)
DRAM voltage 1.6V (Stock 1.5v)
PCI 100 Hhz
All other settings are on Auto. Don't know why CPU-Z doesn't show the correct multiplier or frequency when you add in the fine tuning. Can i really have .043 Vdroop? seems a bit high.

back off the NB voltage. I would think your ram is rated higher then 1.6V. Check the specs on it. Think its around 2.0V. 3.4Ghz @ 1.2V under load is pretty good.

0.043 Vdroop is nothing man. If your over clocking in windows its kind of pointless. You should be doing it from the Bios. As far as I know the q9400 only has a muit of X8 not X8.5 so with the fine tuner I think its throwing you off.

I'm doing everything from Bios. I'll back off the NB, the stock is 1.1V though. I asked the G.Skill tech how much more voltage i can safely add and he said .1v, so stock is 1.5v and i went to 1.6v without any difference.