Confusion on changing voltage. 4890

[WaLshy11]

Hello,

First up, I know for a fact that my cards do not use the volterra controllers. My cards are PowerColor 4890 PCS+.. I have tried numerous ways of changing my voltages but I cannot (due to them not being volterra)

BUT, when I have a look in RBE, the option 'View/Change voltage registers' is enabled.



So, does this mean that I can actually change my voltages through a BIOS flash?
If so, say I want to increase it to 1.35v, I change it in the '0x18' box and also in the all of the PowerPlay Clock Info boxes (i.e. 02,03,04, etc)

I have read the tutorial and everything and know the risk etc.. but I do have another card so I can flash the BIOS back if something goes wrong.
From my understanding though I shouldnt be able to do this so dont know whats up!

[Tatty_One]

Might i suggest you drop the author of rbe a PM as there are risks involved in using the RBE method and a flash may not be reversible, his details are here............

http://forums.techpowerup.com/showthread.php?t=69114

[kylzer]

i thought all HD4890s used volterra controllers.

[W1zzard]

it is not uncommon for aibs to forget about the voltage table (and others) in the bios when making new card designs.

get a multimeter, measure voltage manually (near the row of caps on the back of the card). change a voltage there, measure again. i doubt it has any effect, but you never know

[Tatty_One]

Originally Posted by kylzer

i thought all HD4890s used volterra controllers.

I think all "reference design" 4890's use Volterra's, I beleive the PCS+ is non reference.

[BAGZZlash]

Originally Posted by WaLshy11

So, does this mean that I can actually change my voltages through a BIOS flash?

I doubt it. As W1zzard says: Card vendors might not use the VT1165 for their cards, but still flash the reference BIOS onto the card in the factory.

Originally Posted by Tatty_One

Might i suggest you drop the author of rbe a PM

Not necessary, I'm right here. (Almost) every day.