I did the OCP mod as shown:

 

 

Now i'm struggling to find software that will let me take the vCore over 1.21v. I've tried Asus SmartDoctor, nVInspector (of course) and Afterburner with the voltage unlock tool.... it cannot find the patching location.

 

Any help appreciated

Use the MSI afterburner 2.1 + Voltage unlocker.

Works great here.

If you can't find them, give me a pm with your email.

I tried 2.1 + volt unlock. The slider goes to 1.40v, but if I "Apply" more than 1.21v, the slider jumps back to 1.21v It's confirmed by a hard readpoint.

 

It's progress of some kind... at least voltunlock can patch now!

Sorry, forgot I have a lightning.

 

Isn't the bios limiting this?

I have no idea. It's a CS BIOS.... I don't know if that's useful info or not FBE won't let me push over 1.21v, but I kinda knew that already.

Edited May 25, 201312 yr by K404

This thread interesting also me. I have a MSI GTX 580 TWIN FRROZ II and I havn't do mod. With MSI AFTERBURNER i can go to 1.15V. For 1.23V have you mod the bios K404 ?

Have you used ASUS GPU TWEAKER ?

I have still to try a custom version of SmartDoctor that I found on my hard disk, but every other piece of software i've tried maxxed out at 1.21v real (=1.25v idle, measured with DMM)

This thread interesting also me. I have a MSI GTX 580 TWIN FRROZ II and I havn't do mod. With MSI AFTERBURNER i can go to 1.15V. For 1.23V have you mod the bios K404 ?

Have you used ASUS GPU TWEAKER ?

 

For reach 1.213V (software), unlock the BIOS with FBE.

 

If you have unmodded (K404 mod) ref card and you wish more volts, you will try with 1.6.0x version of the MSI Afterburner for bypass the limit (the GTX 580 ref has same voltage regulator of the GTX 480 ref, so, i think this version of MSI AB can work this "trick" for GTX 580.

 

 

@K404

 

Have you tried the BenchZowner firmware mod for disable protections?

 

Maybe....

 

http://www.benchzone.com/forum/viewtopic.php?f=26&t=37

I've not tried Bills firmware mods. Do they actually work? I have slightly damaged my card- I cannot put the OCP components back on, then increase vCore with software. I am stuck with this situation

Seems like there has to be a feedback/vsense+ pin you can attack somewhere on that card.

Even if the FB pin itself is toast due to the OCP mod, there's still vsense somewhere.

If I recall, Afterburner 1.50 Extreme, 1.51X, or 1.60 beta 4 is the one to use for GTX 480/580...

ok just tested on ref gtx480amp with original bios no mods with abextreme 1.60 beta6 and 1,40 is ok.

cant say if ocp ticks in but it works till 1,50v.

if you want can send you my orig bios and ab?