Question Cannot undervolt GPU in MSI Afterburner, help wanted

[globbleondn]

Hi. I have a Zotac GTX 970 that I am trying to undervolt but MSI Afterburner does not let me. I'm wondering if modding the vBIOS is a legitimate option, and if it is, how do I do it?

 

[hotaru.hino]

What are you doing exactly to undervolt it?

 

[globbleondn]

What are you doing exactly to undervolt it?

I am using MSI afterburner to set a custom voltage/freq curve and it's not letting me

 

[hotaru.hino]

A cursory look on the internet tells me that the V-F curve feature only works on GeForce 10 and later cards.

 

[tennis2]

What about just applying a [positive] frequency offset? That's still an undervolt. It's just an offset of the stock V-F curve. Not as granular, but still effective.