8GB KIT (2 x 4GB) for HP-Compaq 600 Notebook Series HP 620 HP 625 HP 635. SO-DIMM DDR3 Non-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
New DDR3 Memory RAM PC3 10600 for HP 3125 620 625 630 631 635 636 110 3600 CQ56 CQ58 CQ62 EliteBook 2540p 2560p 2740p 8440p|RAMs| - AliExpress
HP 625 Laptop | cltofficesurplus
HP 620 Laptop RAM Memory Upgrades
Amazon.com: HP 15 Series 15.6" Laptop Intel Core i5 8GB RAM 1TB HDD Pale Ash & Gold Silver - 8th Gen i5-8265U Quad-core - Touchscreen - Intel UHD Graphics 620 - BrightView