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HP Elitebook 8540p, CPU i7 720 1.6 GHz, 10 GB RAM, 240 GB SSD. Win.10 Pro | eBay
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HP EliteBook 8540P Laptop, Wireless, 2.40 GHz i5, 4GB RAM, 500GB HD, Win 10 Pro | eBay
HP EliteBook 8540p, Intel Core i5-1st Gen. CPU, 4GB RAM, 320GB HDD, 15.6 inch Display, NVIDIA QUADRO NVS 5100M 1GB DDR3, Win10Pro, Refurbished Laptop
HP EliteBook 8540w RAM Upgrade and Install | Step-by-step DIY Tutorial - YouTube