Vectorworks' Renderworks module is powered by the CineRender engine from Maxon. As such, it is completely 64bit and can take advantage of over 128GB of RAM and multiple processor (CPU) cores.
However, this only affects the Renderworks-based modes specifically. OpenGL, Wireframe and Hidden Line do not utilize the CineRender engine, and thus not capable of using as much memory as their Renderworks counterparts on a powerful 64bit machine with plenty of RAM and multiple CPU cores. Hardware De