20.04 – What ARE the hardware requirements?

Ive tried 20.04 on a phenom x4 905e with 3gb pf ram. It passes all hardware tests. Tried dvd and thumbdrive installs. It goes to a black screen with white ubuntu at the bottom and a mouse pointer that moves but nothing else. Getting really frustrated as ubuntu 8,9, 10, 16 run fine on this machine.