here a tutorial about Speed Pak
it is a simle way to speed up the solidworks while working on assembly.
and without any losing file referances
this is very usefull if you have a complicated assebly like a pc board
click on configurations and right click on default written link
then click on Add SpeedPak
this step you can manually select the faces and surfeces. instead of this, you can click on enable quick include button and it selects automaticly
now you can set degree of transparency
if you click on remove ghost button it will further reduce memory. but it means the components will hidden. so I didnt click on it
as you see, the component diseppear when mouse came near.
this is very simple and it works. :))