Lenovo 55Y3713 Hynix 4GB 2 x 2GB PC3-8500S DDR3 1066 SODIMM Laptop Memory Kit Manufacturer: Hynix HMT325S6BFR8C-G7 Laptop Memory Kit Lenovo Part Number: FRU 55Y3713 Type: SODIMM 204-Pin DDR3 SDRAM Capacity: 4GB 2 x 2GB Bus Type: PC3-8500 1066Mhz