E8400 on an MSI P45 Platinum

Question

I just got done reading the guide on tweaking VTT/GTL which helped me get a better grasp about the awesome settings the P45 have.
Anyway I have a bit of a dillema, I can't seem to get 4.0Ghz without cranking my settings up to this:
Vcore = 1.525v (This will fry it eventually)
CPU GTL REF0 = AUTO (For now)
CPU GTL REF1 = AUTO (For now)
DRAM Voltage = 2.100v (Manu specs)
DDR_VREF_A = AUTO (For now)
DDR_VREF_B = AUTO (For now)
MCH Voltage (Is this the Southbridge?) = 1.556v (I have no idea what to set this to, I just cranked it up as high as it would go)
MCH GTL REF = AUTO
VTT FSB Voltage = 1.60v (What the hell is VTT?)
ICH Voltage (Is this the Northbridge??) = 2.12v
The problem with this is I'm going to cook my system...the funny thing is I can remove the jumpers and run my CPU at 3.6Ghz and all stock voltages without a single problem - however going even 1Mhz above this requires me to crank the hell out of this system.
Anyone here have any settings they use for this board w/ an E8400? I'm kind of out of ideas at this point.
Specs:
MSI P45 Platinum
Intel E8400 Core2Duo @ 3.0Ghz
OCZ OC RAM DDR2-1066 @ 5-5-5-15-2T and 2.1v
Antec TruePower 750w w/ (4) Independent 12v rails

Answer 1

Quote
...the funny thing is I can remove the jumpers and run my CPU at 3.6Ghz and all stock voltages without a single problem
Thats a good starting point. Set BIOS to default and then ensure your memory is at DDR2-800 at ~1,9V.
From there start increasing your FSB. I think you will have a better chance at what you are trying to achieve with a lower memory frequency. See how far you can go that way without changing any other voltages, but always check your V Core under load as you increase the frequency.
I have had my proc at up to 3,7GHZ (board jumpers removed) all other BIOS settings being stock/auto, but I manually kept my DDR at 800.
My  core Voltage will rise to 1,296 under full load at that freq, which is still below the Intel spec max of 1,3625 "Table 2-3. Voltage and Current Specifications in the Intel spec sheet". So I know there is room for more. My CPU core temps will be between 55 and 60C depending on the auto speed-up of the cooler, which I must say is very effective.
Running some real world tests though, i.e. 3D gaming, I found that the increase above the 3,4GHz I am running now, is hardly worth the additional heat and obvious associated higher voltages.  My chipset especially heats up to about 55C and I need to take the passive cooling off at some stage to check the MSI factory paste.