Quote Originally Posted by fornowagain View Post
I don't. I want to know why 1.35v is the maximum. A hardmod would take voltages higher, this method should as well.

Its not hitting any limits, OCP causes instant shutdowns. There are two load states. One is as the game is running pulling the most load and the other as it idles at the desktop. If there was any current limit actuating at the higher VID-1.52v, whilst at idle there is still more current headroom. When switched to heavy 'in game' loads at the higher VID-1.52v then it could reach higher currents and crash, it doesn't. In fact the heavy load current is the same as 1.35v. Indication that 1.35v is the maximum voltage.
Its in the picture as well, the actual voltage never exceeds 1.35v regardless of the VID set.


Another, you see a little variance in load depending on what the game is doing. But loads currents 1.55v=1.35v. Finally default load current @1.26v is a lot lower.


I think you didn't quite understand what I meant to say.

There are circuits that just keep on supplying higher currents to drive higher voltages, until they reach the OCP and/or OVP trip point and shut down to prevent damage.
And there are circuits that have another way to deal with this problem.
They will only supply a certain amount of current. To get a higher voltage you will need the right amount of current to drive the voltage (higher voltage means higher current). In your case it seems that at about 1.35V you have reached the circuits' current limit. Now you can set any higher voltage via VID. There'll never be enough current to drive the higher voltage, i.e. it'll always remain at ~1.35V. Of course the current draw at 1.26V is lower (see above).
BUT, I'm not quite sure if this is the case with your card, because normally in idle state the higher voltage should show. It would just drop down in load state. Maybe it's because the card switches to a lower VID in idle anyway, or maybe on your card there is a different implementation that doesn't even allow VIDs higher than 1.35V. I have no datasheets here so I can't tell you for sure. You need to ask the poeple that have the datasheets. But unfortunately these datasheets seem to be under NDA anyway.

You could test and set all register value for all states to 1.55V (0x58h = 88). Then in idle you should theoretically get the higher voltage.

Besides if and how OCP gets implemented is a question that the developers need to answer. It's not always the same and you can't say that there will always be a OCP limit that will cause the controller to shut down.