So editing the BIOS to a lower or 0% duty cycle setting may have no impact whatever on the fan speed at idle. Even the ability to edit the BIOS fan settings is absent from the GTX750/GTX 750 TI cards, which is particularly annoying as in some cases the minimum fan duty cycle is set as high at 42%. ...

The Kepler BIOS Tweaking part is really universal, i guess this can be done on any branded card, as long as it's running a Kepler GPU. The fan curve adjustment part is really limited to what your OEM tweaking and OC software allows. I think this is all ASUS did when creating the STRIX product line B...

Here is my GPU-Z info and Kepler Tweaker, noticed my original screenshot was showing a different file.
As you said, I guess i have an early edition of the card. It's second hand, so i don't know when it was originally purchased.

Hi Luca, what happened exactly? The only trouble i ran into was that the BIOS wouldn't flash on my first attempts, but that was due to latest nvflash.exe version i downloaded. Went fine when i used the version provided with ASUS UEFI Tool. Nothing more to do other than modify the fan min setting to ...

See attached ASUS GPU Tweak and Kepler BIOS Editor screens.

Done in Windows 8.1 64bit Pro. Tweak works fine in Fedora Linux 20 64bit Nvidia driver 331.79. Thought i would share my silent freak tweak turning an already quite silent ASUS DIRECTCU II cooling system into its STRIX 0db equivalent. My graphics card is an ASUS GTX 680 DIRECTCU II OC, installed in a...