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GIGABYTE Radeon 7970 TO Rev1.0 (GV-R797TO-3GD) mod guide


Massman

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Just found this forwarded to my email. Figured I could share.

 

Card: GIGABYTE GV-R797TO-3GD

 

Guide

 

pop_shim.jpg

 

1) For LN2 GPU, you need to use blade to pop up the shim like picture says.

 

voltage_mod.jpg

 

2) Remove the resistor for unlock the voltage limitation including vGPU and vGDDR

 

3) Please the atiflash to upgrade a new OC bios which name "R797TO3D_OC"

 

Bios download: http://downloads.HWBOT.org/downloads/VGABIOS/R797TO3D_OC

 

Improved OC in BIOS

 

a. Force PCIe to Gen2 mode to make compatible with BCLK overclocking and -120C temp issue

b. Disable UVP, UTP, OVP, OTP and OV

c. Disable Sleep mode when CFX

d. Unlock frequency limitation to 2000/2200 in C.C.C

e. VGPU tested 1.80V, VGDDR test 2.0V

 

4a) Use the OV tool to adjust VRM and voltages., double click R797TO.exe to open the tool. (tool[/url] not public)

 

4b) Download CHL8228 datasheet, find VSEN pin and use VR to overclock.

 

Good luck!

Edited by Massman
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Yes. You just need to flash the BIOS + remove the resistor to unlock full voltage range :)

 

Improved OC in BIOS

 

a. Force PCIe to Gen2 mode to make compatible with BCLK overclocking and -120C temp issue

b. Disable UVP, UTP, OVP, OTP and OV

c. Disable Sleep mode when CFX

d. Unlock frequency limitation to 2000/2200 in C.C.C

e. VGPU tested 1.80V, VGDDR test 2.0V

 

UVP = undervoltage protection

UTP = undertemperature protection

OVP = overvoltage protection

 

etc ...

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Vgpu i removed the resistor, but only tested with afterburner and it didnt work there, so hardmod is needed.

Maybee the bios is for the superclocked? Tested some other Bioses from Techpowerup, all Bioses work, but superclock Bioses didnt work.

I have the 1GHz Ocerclocked Version of this card.

Can you ask Gigabyte for the other Bioses please :)

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http://www.gigabyte.com/products/product-page.aspx?pid=4102#ov

 

Thats my card, same as your linked Card, only clocks are a bit differened;)

The Bios increase the Volt a bit, not that much, but still in Afterburner 1,3V maximum.

I use Win 7 with the newest driver 12.11.

But my card cant boot with that bios, get ATI error on Bluescreen, also the bios is only 64kB, original is 128kB.

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Tryed many times;)

I use atiflash -f -p 0 biosname.rom

I will try with your atiflash again;)

 

Same again, it wont work:(

 

Because your card does not use the same VRM. Mine uses different chip from CHiL CHL8228G. BIOS structure also differs from the GV-R797TO-3GD, and the BIOS submitted is not intended to use on your card.

 

HGyu

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  • 5 months later...

Bumping this thread, since the pictures in the first post disappeared, and I was finishing the procedure this evening...Flashed the bios correctly (but the card is not stable), I need the second picture in order to remove the resistor and unlock voltages...moreover, Massman, is the tool still under NDA or is it public?

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