MSI 7850 1Gb RAM - anyone have these?

[.m.]

just added gigabyte 7950 3GB.

together they crunch 935 Mhash/s
480W at the wall plug

with DiabloMiner

[1715383904]

1715383904

[1715383904]

1715383904

[vdragon]

This number is really high... What clocks? And what core V ?

[.m.]

Every 2.0s: ./atitweak -s                                                                     Mon Apr  1 21:51:05 2013

0. AMD Radeon HD 7900 Series (:0.0)
    engine clock 1150MHz, memory clock 1000MHz, core voltage 1.25VDC, performance level 3, utilization 99%
    fan speed 100% (4121 RPM) (user-defined)
    temperature 78 C
    powertune 0%
1. AMD Radeon HD 7800 Series  (:0.1)
    engine clock 1120MHz, memory clock 970MHz, core voltage 1.21VDC, performance level 2, utilization 98%
    fan speed 100% (3609 RPM) (user-defined)
    temperature 61 C
    powertune 0%
---
I am not able to lower core voltage. Neither with amdovdrvctrl-code or adl3/atitweak

Do you have any idea ?
Can I kindly ask for an idea where to find better bios you mentioned ?

thanks in advance