Quick question

Sup, Recently I bought a GTX 780 but Install it has been a nightmare cuz I need to erase the password of my bios and I can't yet but the thing is..

If I install a new windows, would this work? would I be available to install the new video card?

I'm asking this cuz I work with the Alienware and I don't want to waste a day reinstalling everything if it will not work

thank you!

Quick question