Only two days in front of Apple reveals the iPhone 14 lineup, the lower-end iPhone 14 and iPhone 14 Plus models will be equipped with an "enhanced version" of the A15 Bionic chip. The report gives no extra insights concerning the chip, yet there has been speculation that the standard iPhone 14 models will be equipped with the iPhone 13 Pro's higher-end A15 chip with a five-core GPU for up to 25% faster graphics performance. In the standard iPhone 13 models, the A15 chip has a four-core GPU. Improved graphics performance would almost certainly be the only change to the A15 chip in the iPhone 14 and iPhone 14 Plus, as the chip has a similar 6-core CPU and 16-center Neural Engine in both the iPhone 13 and the iPhone 13 Pro. In accordance with data shared by expert Ming-Chi Kuo back in March, the report asserts that only the iPhone 14 Pro models will be updated with Apple's most recent A16 chip for faster CPU performance. This would mark the first time that Apple first restricts its most recent chip to the Pro models as part of an annual refresh of its flagship iPhone lineup, bringing about considerably more separation between the norm and Pro models. Apple is expected to disclose the iPhone 14, iPhone 14 Plus, iPhone 14 Pro, and iPhone 14 Pro Max during a special event at Steve Jobs Theater on Wednesday. Many new features are expected for the Pro models, including an always-on display with a new pill-shaped notch replacement, an upgraded 48-megapixel Wide lens, faster RAM, and more.