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HP 255 G5 Notebook PC Specifications | HP® Customer Support
parts-quick 16GB Memory for HP ProBook 640 G5 Compatible RAM Upgrade DDR4-2400 SoDIMM at Amazon.com
HP 255 15.6 inch G9 Notebook PC
Memory RAM | 32GB Kit (2x16GB) - HP - HPE Essential HP 255 G5 - - 1600MHz, Unbuffered, 1,35V