I have 4 gig RAM installed in a brand new Dell Precision Workstation 490 (BIOS confirms this) but both Win XP 32-bit and Knoppix 5.1.1 show 3 Gig available. What happened to the last 1 gig of memory? Thanks. Scott -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.