PB520 Video RAM Upgrade

Caution Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty.
 
Specifications
The PB520 system uses the ATI Mach32 video chip with 1 MB video memory soldered on the motherboard. Video memory can be upgraded to 2 MB by installing eight 256KBx4, 70ns VRAM ZIPs at locations U10C1, U10B5, U10B4, U10B3, U10B2, U10B1, U10A2, and U10A1. Some manufacturer part numbers for the proper video ZIP are listed below.

Specifications Company Part
256KB x 4 SAMSUNG KM424C257Z-06
256KB x 4 OKI JAPAN M514262-802

Pin 1 on the VRAM ZIP is on the "slanted" side of the chip, as shown below.

LOCATION
Pin 1 on the ZIP sockets on the PB520 motherboard are located towards the front right of the motherboard, away from the JVESA connector.

Purchase Referrals
To purchase video RAM for this system, contact the following supplier(s).
Coastline Computer Products

Specifications Part # Equivalent PB Part #
8 - 256KB x 4, 70ns VRAM ZIP KM424C257Z-06 Not available from PB