Tahiti LE voltage tweak

Hi all!

I have a PowerColor PCS+ HD7870 Myst. Edition 2GB - Tahiti Le but i cant change the VDDC.
I tried with Trixx 4.4b, Asus GPU Tweak 2.2.9.9, PowerUp Tuner 0.2.1, MSI AB 2.3.0.
The card uses a CHiL CHL 8225 for voltage control. It offers monitoring and software voltage-control features and is well supported through overclocking software.

I found this review. They are using Trixx 4.6 but I can't find it.

Pls, help me find out how can i change the voltage. Default boost voltage is 1,256V.
My card running 1260/1725 @1,256V, but i want under voltage it, and find out how much voltage needed to 1100Mhz.

And if you have a solution how can i disable the boost then pls tell me. I tried 7950 non boost bioses, but not working.

Thanks!

W1zzard said:

The new version of Trixx will support it, but it's not publicly released yet. Should be any day.

Click to expand...

Thanks for fast response!

I hope i can undervoltage it because the card is very very warm.
If i set the lower voltage then this will be the default 3D voltage or the boost will overwrite it ?
If i cant overwrite the boost voltage then does not matter what i set.