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Tahiti LE voltage tweak

kovsol

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Video Card(s) PowerColor PCS+ HD7870 Myst. Edition 2GB - Tahiti Le
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#1
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!
 
Last edited:

W1zzard

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#2
The new version of Trixx will support it, but it's not publicly released yet. Should be any day.
 

kovsol

New Member
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Jan 16, 2013
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Location
Székesfehérvár, Hungary
Processor i5-3570K@4500Mhz
Motherboard MSi Z77A-G45
Cooling H2O
Memory 2x4GB Kingston HyperX DDR3-1600@1866
Video Card(s) PowerColor PCS+ HD7870 Myst. Edition 2GB - Tahiti Le
Storage OCZ Vertex3 120GB SSD + WD Green WD20EZRX 2TB
Display(s) Samsung 32D5000
Power Supply FSP Aurum 400
Software Win 7 64bit
#3
The new version of Trixx will support it, but it's not publicly released yet. Should be any day.
Thanks for fast response!

I hope i can undervoltage it because the card is very very warm. :mad:
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.
 
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#5
I'm looking forward to the new TRIXX update. Thanks W1zzard! :cool: