Each DRSX4800 upgrade consists of a matched pair of DDR3-1066 Registered ECC DIMMs that conform to JEDEC’s DDR3, PC3-8500 standard. One 2K-bit EEPROM is used for Serial Presence Detect and acombination register/PLL with Address and Command Parity is also used. A thermal sensor accurately monitors the DIMM module and can prevent exceeding the maximum operating temperature of 95C.