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Confusion on changing voltage. 4890

WaLshy11

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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_Two

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kylzer

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i thought all HD4890s used volterra controllers.
 

W1zzard

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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_Two

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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

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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.

Might i suggest you drop the author of rbe a PM
Not necessary, I'm right here. (Almost) every day. :)
 
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