32GB PC3-8500 DDR3 ECC 8K 1066MHz Low Voltage RDIMM Memory Module. 240-pin, registered dual in-line memory module (RDIMM). Fast data transfer rates: PC3-8500. 32GB (4 Gig x 72). Heat spreader. Backward compatible with standard 1.5V DDR3 systems. VDD = 1.35V (1.283-1.45V). VDD = 1.5V (1.425-1.575V). VDDSPD = 3.0-3.6V. Nominal and dynamic on-die termination (ODT) for data and strobe signals. Quad rank, using 4Gb or 8Gb 1.35V TwinDie devices. On-board I2C temperature sensor with integrated serial presence-detect (SPD) EEPROM. 8 internal device banks. Fixed burst chop (BC) of 4 and burst length (BL) of 8 via the mode register set (MRS). Gold edge contacts. Halogen-free. Fly-by topology.