Vcore in 3.7mod BIOS Challenge for Aicjofs :)

Question

Aicjofs,
I know that youve been asked before about the Vcore settings in the bios for the K8N neo4, but I thought Id bring up the subject again just in case there is new info.  Its my understanding that the bios is locked down for Vcore voltage based on the chip your running and I think it was 1.65 maximum no matter what.  Just wondering if you figured out how to unlock that setting so that no matter what CPU is there, you can run it up to 1.65 volts. 
Im having the issue where I set the Vcore to the max of 1.4 volts for my CPU and overvolt of 9.9%  (Total set of 1.539 volts) but in CPUZ it shows as 1.488-1.5.  Now Im pretty sure this means my PSU is at its max even though theres no change in the other voltages,  probably going to have to get another  PSU........again :(     
But I would still like to try to get into the Mid 1.5 volt range or higher for overclocking reasons.  Power need more power 
Just wanted to ask or get others opinions.  (I really want to hit that 3 Ghz mark with my X2)

Answer 1

Opps I just now saw this... 
Here is the low down on what I know. 
- Voltage regulator overvolt protection is ~1.7v
- Voltage regulator is 3 phase, and not quite as high quality.
- CPUz and the MSI board don't match up.  The only way to see for sure is but a multimeter on the board.
- The Vcore is somewhat unstable compared to other boards. 
- My board seems to undervolt, and it seems others have the same issue, why yet others don't.
More each of these points again...
- I don't see MSI giving us 1.7 for the obvious reason.  Another thought on that, if the overvolt is at ~1.7v then 1.6v is probably somewhere near the max stable for this design and it's longevity(Most systems set OVP at 5-10% above what the system is designed for under normal load).
- 3 phase power and it's implementation on this board is probably the reason of the less stable Vcore compared to other boards with 4 phase or more.
- Like I said the only way to know for sure is to hook up strait to the board.  In my particular case the voltage was closer to the lower CPUz value then Core Center/BIOS.
- Seems the 3 phase problem again(not really a problem it's just the design).  Although if you have wild swings there is a problem.
- The undervolting is bad because the general concensus for A64 90nms seem to be 1.6v max in the OC community.  Our boards only do 1.59v on the best day and if they undervolt you can't attempt to maximize your overclock.
So now the BIOS thing.  It's there, the code is written into the BIOS, it's selectable.  The problem is somewhere before the menu code there is something that locks out these higher values based on what CPU is installed, or possibly what the max VID is.  Since ours are 1.3-1.4 then the options aren't available.
I have talked with other BIOS modders that do MSI stuff, and 2 of them called it "super" locked.  Which really means if we were good enough could be unlocked but that requires more disassembly then is worth it.  There are guys that could do it easy, but getting their time, especially for an MSI board is limited.
Like I said, it's there...
But Wagon, what happens if you set 1.45 and 9.9%?  Should give you 1.595 in theory and probably about 1.53-1.55 in CPUz.