Robust proxpress m4020 3820 3320 series feature print speeds of up to 40 ppm powered by a cortextrade a5 core processor and up to 256mb of memory high speed and performance enable businesses to accelerate document and image processing for increased efficiency 40ppm and 256mb of memory are available on m4020nd model only 38ppm and 128mb of memory are available on m3820dw m3820nd and m3820d models only 33ppm and 128mb of memory are available on m3320nd model only the printersrsquo