Nearly all 11880 users I know of, uses a RIP (incl. myself).
Efi, Colorburst or ImagePrint.
When you start to print BIG files with the driver, like 500 Mb or more, it takes 30 min (if you're lucky) or nothing
happens at all. The system makes such huge spoolfiles that it just give up.
A RIP like ImagePrint never uses the system, but sends a textfile containing information about papersize, color management,
etc, and small "packages" of the stored image. So it works extremely well also with a smaller computer.
I printed a 15 feet@1,7 Gb banner today, and the printer was running just 50 sec. after I hit the button