PB520R Cache Upgrade

Caution Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system themselves should know about the dangers of electrostatic discharge (ESD) and the necessary precautions. Unknowingly damaging the components of the computer will void the warranty.
 
Write back cache
16KB Internal Cache (integrated into the CPU)

256KB Secondary External Cache (Soldered on-board)

Not upgradable.