R9 280x undervolting - NO way. Help plz.

[Termie]

Hi,

I have a MSI R9 280x 3 GB which I try to undervolt since a few hours, but there is NO way.
As soon as a change the slightest value with VBE7 -> example

State 1 - Performance
Core Clock #0 org. 1020 MHz with 1.200V to 1.190V, laughable 0.1V less

and re-flash, the card stucks at 500 MHz core / 0.950V. While others successfully get this card to 0.950V and below under full load (for mining, not gaming), my shitty exemplar get stuck after the slightest change. Also with org. BIOS, a can change absolutely nothing via software (AMD Crimson/Afterburner), no clockrate, no mem speed, no voltage (I also use a R9 Nano, here I can change everything fine).

Can please anyone help me, I´m hopping mad at the moment with this #*$§%&@!!! card. Here are als cards data:

Revision SB28 with 1.20V core (there seems to exists also revs SB31 und SB38 with 1.25V core)
BIOS Version 015.040.000.003.003435
Device ID 1002-6798
Vendor ID 1462 / Subsystem ID 2775


Thanxxs a lot in advance and sorry for my rookie english.

 

[EarthDog]

Why don't you do it with software?

 

[Termie]

how I wrote above, the card don´t react to any software Crimson/Afterburner value changes.

 

[Ferrum Master]

Probably it has as different VRM... your only option is a hardmod.

 

[Schmuckley]

lower clocks,too

 

[basco]

you should look under hood for volt chip and tell us what it is? should have CHiL CHL8228
sometimes ya need to work with afterburner to support your card:

http://forums.guru3d.com/showthread.php?t=399542