Paul asked the following: >>Does anyone know if 512MB and 768MB memory boards are supported on the >>99x Corporate systems under MPE/ix 5.5? Response: Yes, they are supported even prior to 5.5 according to the HP 3000 Configuration Guide (Page 2-38). They are typically used for configurations above 2.5 GB which became supported in the 1st half of 1996. Hope this helps.