Would I need a new case?

Hi, I'm looking to buy the 5090 if it's possible againts the scalpers, but I'm not sure if I need a new case. I'm currently running a 3070 rog strix and looking to get the 5090 astral if it isn't £2400+.

The case that I'm using is 4000D airflow with 3x120 fan and radiator on the side.

Thanks.