Im struglin with my computer performance, Its a T5500 with two x5675 procesor, 72gb ram 1333, 3gb Nvidia card, Windows 10 pro, SSD 900gb samsung and A06 BIOS

I use It for music production, Cubase Is my main software, But when using with plugins AND virtual instruments the sound clip, open the task manager AND the cpu Is at 33% the most, and the RAM of 8 or 9 GB, how can I improve the performance, I have changed the video card, the SSD increased the RAM but I dont see any improvement, was thinking to upgrade the BIOS to a17 but dont know if Its possible or It would be better, hope someone can help me