Arch Memory 24 GB (3 x 8 GB) 240-Pin DDR3 Udimm RAM Replacement for KVR13N9K3/24 at Amazon.com
I've seen people install the 32gb version but haven't seen the 16gb installed. Saw it on Amazon for $69 so...24gb total ddr4 3200, sure why not. : r/ZephyrusG14
Amazon.com: ASUS VivoBook 15 S513 Home and Entertainment Laptop (AMD Ryzen 7 4700U 8-Core, 24GB RAM, 1TB m.2 SATA SSD, AMD Radeon Graphics, 15.6" Full HD (1920x1080), Fingerprint, WiFi, Win 10 Pro)