Our SDRAM memory modules are available in PC100 (100MHz) and PC133 (133MHz) standards. Varying in capacity from 128MB to 256MB and 512MB, the SDRAM modules are suitable both for the older systems and for some more recent ones which use either SDRAM or DDR RAM. Our Memory Configurator feature can provide compatible SDRAM memory upgrades for certain systems.’s range of SDRAM modules, manufactured by Transcend, Adata, and Advance, has 168 pins and operate at 3.3V.