Kingston Technology 256MB SDRAM, System Specific Memory. Internal memory: 256 MB, Memory clock speed: 133 MHz. Serial page access: 15 ms, Random access: 19 ms, Access time: 10 ms. Operating temperature range (T-T): 10 - 35 °C, Operating relative humidity range: 10 - 85 %. Compatibility: PC, Processor clock speed: 133 MHz, Compatible operating systems: Any