Cubase Project is really taxing on my computer

So I have a project that seems to be really taxing on my PC. I dont know why, I use Spitfire BBC Orchestra Professional in many other projects and they dont act up as much. I dont think that I have so many tracks open on this one but when I hit play i am confronted with fram freezes and audio dropouts…CPU and RAM are fine when the project is open but the Power Usage shows Very High in the Task Manager…is it a hardware issue or how can I fix this?