If you are referring to the Windows Secure Boot capability, the card needs to have a UEFI bios. I checked the page and did not see anything mentioned, so you might check your paperwork.
If it doesn't work, you will be put back into the bios. On my ASUS board, the bios will be changed when it does that to enable the CSM, which will allow you to boot. If the card does not currently have Secure Boot compatibility, there may be a way to update the firmware to allow it.