Volt Mod And OCP mod GV-R797OC-3GD Rev2.0

[G81]

Hey guys

 

****** Please DO THIS AS YOUR OWN RISK *******

 

You may have problem same as me to set voltage on 7970 OC Rev 2.0 the software program dont support to set voltage

 

i buy two card one is rev 1.0 and another is rev 2.0 lot of different between this two

 

here is the pic

rev 1.0

 

 

rev 2.0

 

 

i get confused when see the difference .... any way here is hard mod for OCP And Vcore

 

 

You Can Read Vcore from Phase at back of the card and any way you can set 50K Vr for Vcore too nothing change and you have fast Vcore up

 

For me its work Ok without problem soon share result

 

i Edit bios Too for more stable on OC and can make higher Frequncy with same voltage Pm me if any one want bios

 

 

Share Result here Soon

Edited December 14, 2012 by G81

[Massman]

Fyi - http://hwbot.org/forum/showthread.php?t=61911

[G81]

Fyi - http://hwbot.org/forum/showthread.php?t=61911

 

there are so many different between this two card that use chil 8228G and this use ADP4100 and its lot different between this card and modding not work not OV tools work for it

[Massman]

Oh, okay, interesting. So the one in my thread is rev1.0 and the ADP4100 is rev2.0?

[G81]

Oh, okay, interesting. So the one in my thread is rev1.0 and the ADP4100 is rev2.0?

 

 

Yep your Tapic for Rev 1.0 and its work fine on TO card not Oc

 

For OC card there is driver problem when you upgrade bios driver dont detect the vga card i think it have little problem with some code !!

 

but this one work fine on Rev2.0 i still wait for ln2

[Bobnova]

Interesting, totally different.

[Moose83]

Hey nice, i have this card:) Now i can try your Mod

[Olesius]

interesting

[G81]

Hey nice, i have this card:) Now i can try your Mod

 

You have your own chance mine is not bad

 

-----------------------------------------------------

 

Here is the result :

 

Pic modding

 

 

System :

 

3770K - 215A971

MVE

Gigabyte R797OC-3GD rev2.0

Gskill Pi

 

 

And the Result

 

3D mark 03 - CPU @ 6420

 

 

3D mark 11

 

 

VGA not Stable on 11 yet i dont know why there is no different in frequency (Stock or OC) windows fail or break resistor on die ( i dont know when it happen),,,,

 

 

Any way i find my pot break 4 resistor on the VGA die hope Rma replace it

[Massman]

Can't release the BIOS ?

[Thorn]

Would you G81 or someone else mind showing me a picture where I can read the actual voltage of the GPU with a multimeter? For the GV-R797OC-3GD of course. Thnx!

[der8auer]

Is that the same layout?

 

If yes just use one of the capacitors like I marked it

 

[Thorn]

Well I think that's my Card but there is a cooling shim on my VRM's. Please have a look

 

edit: tried one of your marked spots. MM was giving me 1.163V. Right spot found thank's to you.

 

 

 

Seem's like i have a very lousy card . 1200-MHz @ 1.25V are unstable in Crysis 1 bench... well better luck next time for me - hopefully

Edited March 4, 2013 by Thorn

[miktil]

Hi Guys, just want a little help from U with the Vmod on 7970oc rev2.1

 

First of all, whats the best spot for ground? A radiator, screwhole, one of the pins on 8pin-6pin socket?

What value has to be on the trimpot. Some website says 40-50KOhms, some mention 100KOhms? I just want to have max 1.3V on the GPU. Which one i should put?

Do i really need the OCP mod if i want to push the card to 1.3V?

 

Here`s a pic of the ADP4100 VR on my card

http://img692.imageshack.us/img692/5466/r4h6.jpg

 

and the last thing. if i want to read the actual voltage the red wire from MM has to go to on of the capacitors marked by der8auer and the black to the ground?

 

Thanks