BitLocker not saving

Video card was changed out. After installation the BitLocker was required.

I entered it and it works.

Every time I reboot it asks for it again.

Bitlocker what?
Password, recovery key?

Changing out graphics card has possibly glitched the tpm.

Have you tried decrypting the drives, and then re-encrypting the drives.

I would think there is a fair chance this would reslove things?

You may even need to reset the tpm but do not do that until you have backed up all valuable data. I have never needed to do this admittedly.