r9 380x and the support for video mode 103

1st sorry for the bad ENG it is not my native language.

for the question I just bought a sapphire R9 380X and I have an old dell T7400 , I put the card in and start the machine then the welcome screen changes from what I used to before and I can not enter bios.

I found out that this is because the new card do not support the video mode 103

after a lot of searching  on the internet and other forums I could not find a solution

So I would be happy to know if there is one , or should I just accept the "no more bios" feature  that came with the new card ?

Thanks