According to the Asus page for the card: https://www.asus.com/no/Graphics-Cards/ROG-STRIX-RTX2070-O8G-GAMING/
It says:

*To activate 0dB mode, please use GPU Tweak Software with the Performance (P) bios mode selected, or engage Quiet (Q) bios mode by using the onboard switch.

But I can't find an option in the GPU Tweak software that says 0db Mode, you got a Silent profile, which lowers the fan speeds, but they don't shut off when under 55c as it does in the Quiet bios, has this feature been removed from the Performance bios, or am I missing something here?