ASUS tends to go big with its ROG Phone series, and the ROG Phone 5 will be no different. According to multiple Geekbench listings, the company plans to release the ROG Phone 5 with 18 GB of RAM, giving the device bragging rights over its contemporaries.
https://www.notebookcheck.net/The-ASUS-ROG-Phone-5-will-be-the-first-smartphone-with-18-GB-of-RAM.525760.0.html