I turned my Elitebook 2570p into multi purpose, triple boot (Windows 10, Manjaro Linux, macOS High Sierra) super laptop. Also can utilize egpu in every system : r/computers
HP EliteBook 2570p, Core i7-3520M 2.90GHz, 4GB RAM, 320GB HDD, 12.5” LED screen | eBay
OFFTEK 8GB Replacement Memory RAM Upgrade for HP-Compaq EliteBook 2570p (DDR3-12800) Laptop Memory at Amazon.com