DStith
Do I need this BIOS if I own a launch 2080ti XC ultra card? Seems to run fine out of the box.
It simply increases the maximum power target which increases overclocking headroom for extra performance. If your card is working fine out of the box, there's no reason to flash this BIOS unless you're thinking of trying to obtain even more performance from pushing the clocks even further.
Also note, I believe later builds of this card shipped with the BIOS already installed. You can check that with EVGA Precision.