The LJ4-MP had an available Postscript implementation in hardware that used up one of the four RAM slots, so with that module in place, it accepted less total RAM. It was my understanding that it wouldn't accept larger size RAMs, however. I can't recall the limit, but my LJ4MP has to be one of the best computer hardware purchases I ever made. No trouble from it in the six-eight years I've owned it., and I've done a LOT of printing with it.Originally posted by: rdubbz420
postscript driver? is adobe driver, pcl is hp's driver.