Hynix 4GB PC3-12800 DDR3 1600MHz non-ECC Unbuffered HMT351S6CFR8C-PB Guaranteed Hynix Genuine Part Number: HMT351S6CFR8C-PB / Type: Memory RAM Capacity per Module: 4GB Memory Type: DDR3 SDRAM / Bus Speed: PC3-12800 (DDR3-1600) **Ship within 24 hours except holidays and weekends**