In this guide, you will learn how to upgrade RAM, SSD, HDD, 3G on HP EliteBook 820 G1, I will remove the service cover and access the battery, ram, hard drive, wireless card.
There are no screws securing the back cover, just unlock the switch and remove the back cover.
Under the cover, you can access the battery, ram, hard drive, wireless card. You can clean the cooling fan with a brush or air-blowing.
HP EliteBook 820 G1 have two ram slots, come with a 4GB ram, so you can add another 4GB ram, EliteBook 820 G1 have a spare 3G slot, you can add 3G card.
RAM: come with 4GB, you can upgrade to 8GB.
RAM Type: DDR3 1600MHz.
HDD: come with 500GB, you can upgrade to 1TB.
SSD: come with 32GB SSD, you can replace it by a bigger SSD.
Second HDD: no support.