New life for an old iMac 10, surprised still useable after 12 years. RAM upgrade 10,1

My customer brought me his old iMac to get running again. The the browser and root certificates were out of date preventing the computer from going to most websites. I also had some old 2GB DDR3 ram laying around to upgrade. The latest version macOS I could install was 10.13.6. He is able to browse the internet again. Having a dedicated GPU helps.
https://www.amazon.com/gp/product/B07WZVQ5V5/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeAS=B07WZVQ5V5&linkId=a8956b61ad80d1e045a5b070f89a54c7