The iQOO Z1x is set to launch on July 9, 2020 and to rock the Snapdragon 765G processor on this date. However, the OEM has yet to confirm any more details on the new phone's internals. A new Master Lu listing for a device with an unfamiliar model number is now linked to the upcoming mid-ranger, however, and may show what it can do with 8GB of RAM.
https://www.notebookcheck.net/New-Master-Lu-benchmarking-results-may-confirm-8GB-of-RAM-for-the-iQOO-Z1x.480382.0.html