Part Number: HMT31GR7EFR4A-PB HMT31GR7EFR4A-PB SK hynix Inc. is a South Korean memory semiconductor supplier of dynamic random access memory chips and flash memory chips. Hynix is the world's second-largest memory chipmaker and the world's fifth-largest semiconductor company. Memory Type DDR3 SDRAM Capacity 8GB Pins 240 Pin Bus Type PC-12800 Error Correction Registered ECC