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NOKOTION KIWA7 LA-5082P For Lenovo G550 Motherboard With Heatsink+4GB RAM +Power Button Switch Board+CPU Fit for G555 LA-5972P
NeweggBusiness - Lenovo Laptop Intel Core 2 Duo T6600 (2.20GHz) 3GB Memory 320GB HDD Intel GMA 4500MHD 15.6" Windows XP Professional preinstalled with Windows 7 Professional Upgrade Option G550(2958-A4U)
MemoryMasters 4GB DDR3 Memory RAM for Lenovo G550 - Walmart.com