HP 641369-002 - 4GB, 1600MHz, 240-pin, PC3-12800, shared DDR3 SDRAM Small Outline Dual In-Line Memory Module (SODIMM) Retail
HP 506263-001 - 4GB, 204-pin, DDR3 PC3-8500, 1600MHz, Small Outline Dual In-Line memory module Retail
Laptops - 204-Pin SODIMM: 4GB 1066Mhz PC3-8500S DDR3 204-Pin SODIMM Laptop RAM Memory Module Sale $49.00 Retail $89.00
Laptops - 204-Pin SODIMM: 4GB 1333Mhz PC3-10600S DDR3 204-Pin SODIMM Laptop RAM Memory Module Sale $40.00 Retail $59.00