Color LaserJet 5550 series

27 ppm black, 27 ppm color, 600x600 dpi HP ImageREt 3600, 160 to 288 MB standard upgradeable to 544 MB, 533 MHz processor

24 ppm black, 24 ppm color, ImageRET 4800 resolution, 416 MB max, 500 Mhz processor

Color LaserJet 4650 series

22 ppm black, 22 ppm color, 600 dpi, between 160 to 288 MB standard upgradeable to 544 MB, 533 MHz processor 

Color LaserJet 2550 series

20 ppm black, 4 ppm color, 600 dpi, 64 MB upgradeable to 192 MB, 264 MHz processor

Color LaserJet 3700 series

16 ppm black, 16 ppm color, HP ImageREt 2400, 64 MB upgradeable to 448 MB, 350 MHz processor

Color LaserJet 3550 series

16 ppm black, 16 ppm color, True 600 x 600 dpi with HP ImageREt 2400colour, 64 MB, 266 MHz processor

Color LaserJet 3500 series

12 ppm black, 12 ppm color, HP ImageREt 2400, 64 MB