Hello Dean,
Which notch are you talking about? Would you circle it in a picture and send it to follows email address? Thank you.
shopservice@bitspower.com.tw
If the notch is not only in the acrylic front plate but also in the bottom copper, that's to avoid the chipset on the card. Sorry if our documentation makes you confused. And you can refer to the video by the link here.
Any questions, feel free to contact us.
https://www.youtube.com/watch?v=Qv4Liv6bEPc&t=137s
