Hi!
Thanks Justageek, very good info!
Check at the guide, in part 3B. The correct formula for voltage should be:

Voltage = (VID * 0.0125) + 0.45

I'm trying this with my HD4870. Just to check if it applies.

rivatuner.exe /ri1,70,1a returned I2C 01 70 1a : 0a, the other three were "invalid".

The problem is that every register (15,16,17,18) returns 41. Wich in fact it is my actual Voltage.

v = (65 * 0.0125) + 0.45
v = 1.2625

And I think it is correct, because I edited the BIOS so there is no energy-saving mode, it's allways at full speed.

But there isn't a different value for the other registers until I get to... 45, for example, that returns 5E... and that will set 1.65V.
Question is, wich are valid register? Can I set whatever register I want that returns a valid voltage value?


Sorry for my English!