Phenom 9500 w/ MSI K9A2 Platinum

[justapost]

MSR only stores VIDs, so yep, you are talking about CPU/NB VIDs. Now those are different to voltages, but they affect voltage. Each VID decides the lowest and highest voltage available and if you don't manipulate the voltage, it will be set to default as the lowest voltage available for that particular VID. I'll show you a quick VID->default voltage mapping here, it's still incomplete though.

Thx, I'l see what values I noted.

If you place 00 and 10 for both CPU and NB, and say both give you the same MHz, then you won't be able to do better with any voltage option, because they do exactly that, control the voltages being fed. These are set with the Phenom CPUs not the BIOS, thus 000 = 1.536V and 010 = 1.416V.

You said the VID is limited depending on your vcore setting. Have you checked MSR register C001_0071? Bits 48:42 are MinVid and bits 41:35 are MaxVid. I assume both are zero on the unlocked be. SviVID codes are listed on page 29 in the AMD BKDG and are identical to your table.

Ah OK. Well make sure you let others know too because it's confusing. Since VID is not the voltage. You're probably around CPU VID 22 there I'm guessing.

Sry, thought I mentioned it in the past. Gonna check the msd registers tomorrow, but amd pm seems to show cpu and nb vid's translated via the table.

This is the back of the board, CPU VRM area? I can't even tell where on the board that is TBH.
There is no way to tell like this if I haven't seen and played with the board/specs to be frank. You have to change the VID, know the voltages it sets and then measure around the MOSFETs/inductors to find the right legs to measure which correspond to the voltage you're after. Then you have to start adding/decreasing resistance (as needed) to the resistors controlling the voltage to those components, and see how it affects the component voltage overall.

Guess it's easier to find the resistances connected to the FB and FB_NB pin of that pwm chip. NP

I haven't read its specifications so I don't really know, will do now but it should be 1 phase for CPU NB power control and 4 phase for CPU cores for Phenom MBs.

If you're asking how long I've been in computer oc, then not too long, probably since Pentium 66MHz, that's the first one me and a friend tried to overclock and destroyed it somewhere around '94-'95.
Had to work 9 months to cover the expenses, they were that bloody expensive and in rare supply where I was living!

He He my Pentium 60MHz survived, but I payed round 4000€ for that system so it was to valuable even thinking about overclocking it. If overclocking by accident counts I might have started earlier however.