Minimum fan speed override on 1660Ti

[tony359]

Hello all,

I've acquired an old 1660Ti today - after replacing the old thermal paste and a little undervolting, the card works like a charm and runs pretty cool (it runs 20C cooler compared to the "as is" status!!)
Because I am going to use it for my home theatre, I am a bit disappointed that the card (msi 1660 ti ventus xs 6g oc) does not support idle fan stop but, most importantly, the minimum fan speed is capped at 41% which is 1500RPM.

I'd love to go lower than 1500RPM.

Afterburner doesn't seem to be able to override that.

What are my options when it comes to that? I am capable of removing the BIOS IC and I do have a programmer if that helps - but I believe it won't be needed unless I brick the card!

Someone suggests to flash a BIOS from an MSI 1660Ti gaming series. Before going to flash BIOS, I was hoping someone could point me to the right direction, including a backup route (besides de-soldering and flashing the IC) in case things went front.

Thank you!

 

[tony359]

Just to update, after educating myself I have flashed the "Gaming X" BIOS (it's an identical board basically, just with some extra features and a little extra boost). No issues whatsoever and I now have idle fan stop. The fan can go down to 25% (800rpm) manually if needed.

No instabilities and benchmarks are slightly higher because of the extra boost. I've undervolted the card and made a custom fan curve and it's perfect now. All sensors report the correct values and temps are ok.

I used the official nvflash and this BIOS. nvflash complained the PCI ID was different but let me flash anyways.

I had a couple of crashed in DOOM Ethernal but due to excessive undervolting, resolved by reducing the undervolting to 900mV.