Originally Posted by ziddey
Just wanted to post about something interesting I've found. With all bioses up to F9, on my rev2 board, actual vdimm was about 0.1v higher than what I set in bios. It was fixed in F10 somehow and they became dead accurate, both by vcore2 readings in speedfan as well as dmm testing. I went back to f7 now since it's my best bios still, and I got the extra 0.1v gain again.
With my rev1 board, it wasn't affected. Seems a little weird that it's inconsistent like that. My rev1 board still was always 0.1v under spec... that is until I vdimm modded it to bring baseline to 2.0v
edit: also figured I'd point out that disabling c1e and eist shouldn't really do much to help overclocking really. I've found that it's onyl when you keep vcore at stock that c1e/eist will scale vcore down with load/multi. Once you tamper with vcore at all, it'll lock onto max value. This was tested with both f7/f10 and I'd imagine it'd be similar across all p965's. It still does however drop down multi to 6x under idle load, so I suppose it'd still help with idle temps and power consumption. So to all those out there, if you're paying for electricity or otherwise want to cool down idle temps, give turning on c1e/eist again to see if it's still a go.
Stock volts on my e6400 is real close to getting stability, but it's not. Requires 1.375v set volts. Maybe if I figured out vdroop mod for rev2 board, or if vcore mod via pin manipulation would result in proper downscaling, I'd be able to run "normal" vcore and have it scale down again. I noticed a real dramatic temp drop at idle with it functioning with stock vcore set in bios. At 3.2ghz and 1.375v set, I was seeing around 33'c idle. With it set to 1.325v and idle (which brings down to 2.4ghz (6x400) and 1.1ish volts), I was seeing roughly 24'c. Pretty good drop. Of course, load temps are the same since it goes back up to normal vcore and multi..