Despite differences in processors, storage, cameras, and more, every iPhone 14 and iPhone 14 Pro model has the same 6GB of RAM.
iPhone 14 and iPhone 14 Plus
In July 2022, a rumor suggested that the iPhone 14 would use LPDDR4X RAM while the iPhone 14 Pro models would 6GB receive newer and faster LPDDR5 RAM. As it turns out, the rumor of RAM quantity is true.
On Thursday, a report from MacRumors shared the discovery contained within data harvested from within the latest Xcode 14 beta files, confirming the 6GB -- but not the type of RAM.
iPhone RAM in 2021
- iPhone 13 mini: 4GB
- iPhone 13: 4GB
- iPhone 13 Pro: 6GB
- iPhone 13 Pro Max: 6GB
iPhone RAM in 2022
- iPhone 14: 6GB
- iPhone 14 Plus: 6GB
- iPhone 14 Pro: 6GB
- iPhone 14 Pro Max: 6GB
The Xcode files don't contain information on what kind of RAM the phones have, and only address the amount of RAM. The entire iPhone 13 line does contain LPDDR4X, mostly from SK Hynix.
The RAM powers an A15 Bionic chip inside the iPhone 14 and iPhone 14 Plus, and an A16 Bionic chip inside the iPhone 14 Pro and iPhone 14 Pro Max.
The iPhone 14 and iPhone 14 Pro will be available to pre-order on Friday, September 9 at 8 AM Eastern Time. The iPhone 14, iPhone 14 Pro, and iPhone 14 Pro Max will start shipping on Friday, September 16. The iPhone 14 Plus will be available Friday, October 7.
AppleInsider has a comparison of the iPhone 14 and iPhone 14 Plus against the iPhone 13 and iPhone 13 mini.