RAM & Memory Upgrades
512MB (2 x 256MB) PC100/133 168-PIN SDRAM DIMM MEMORY RAM KIT COMPATIBLE WITH PC DESKTOPS/MOTHERBOARDS
SIZE/CAPACITY: 512MB KIT (2 x 256MB) VOLTAGE/POWER CONSUMPTION: 3.3v CAS LATENCY: CL2 / CL3 SPEED: PC100 (100MHz) / PC133 (133MHz) - TWO SEPARATE MODULES AVAILABLE AT EACH SPEED TYPE/INTERFACE: 168-PIN SDRAM DIMM 168-PIN SDRAM DIMM
https://www.bizrate.co.uk/ram_memoryupgrades/512mb-2-x-256mb-pc100-133-oid37891928670.html