Toshiba Tecra A4 (PTA42) - Manual (Page 14)

User’s Manual xiv
General Precautions
Main Memory Disclaimer
The graphics system in your computer may use part of the main system
memory for graphics performance and therefore reduce the amount of
system memory available for other computing activities. The amount of
system memory allocated to support graphics may vary depending on the
graphics system, applications utilized, system memory size and other
factors.