This breakdown also serves as a way to see all the differences that the 2024 iMac brings to the table.iMac (2021) iMac (2023) iMac (2024) M1 chip (made with TSMC's 5nm (N5) process) M3 chip (made with TSMC's 3nm (N3) process) M4 chip (made with TSMC's enhanced 3nm (N3E) process) 3.20 GHz maximum CPU clock speed 4.05 GHz maximum CPU clock speed 4.30 GHz maximum CPU clock speed 16 billion transistors 25 billion transistors 28 billion transistors 8-core CPU 8- or 10-core CPU 8- or 10-core CPU 7- or 8-core GPU 8- or 10-core GPU 8- or 10-core GPU Updated GPU architecture Updated GPU architecture with improved efficiency Dynamic Caching Dynamic Caching Hardware-accelerated ray tracing Hardware-accelerated ray tracing Hardware-accelerated mesh shading Hardware-accelerated mesh shading Video decode engine Higher-bandwidth video decode engine Higher-bandwidth video decode engine Hardware-accelerated H.264 and HEVC Hardware-accelerated H.264, HEVC, ProRes, and ProRes RAW Hardware-accelerated H.264, HEVC, ProRes, and ProRes RAW ProRes encode and decode engine ProRes encode and decode engine Support for AV1 decode Support for AV1 decode LPDDR4X memory LPDDR5 memory LPDDR5X memory 68.25GB/s memory bandwidth 100GB/s memory bandwidth 120GB/s memory bandwidth 8GB or 16GB unified memory 8GB, 16GB, or 24GB unified memory 16GB, 24GB, or 32GB unified memory 16-core Neural Engine, 11 trillion operations per second 16-core Neural Engine, 18 trillion operations per second 16-core Neural Engine, 38 trillion operations per second 1080p FaceTime HD camera 1080p FaceTime HD camera 12-megapixel camera Center Stage with support for Desk View Image signal processor (ISP) "New" image signal processor (ISP) "New" image signal processor (ISP) Nano-texture display option Dedicated display engine 3.5mm headphone jack 3.5mm headphone jack with support for high-impedance headphones 3.5mm headphone jack with support for high-impedance headphones Up to two Thunderbolt/USB 4 ports and two USB 3 ports Up to two Thunderbolt/USB 4 ports and two USB 3 ports Up to four Thunderbolt 4 ports Wi-Fi 6 Wi-Fi 6E Wi-Fi 6E Bluetooth 5.0 Bluetooth 5.3 Bluetooth 5.3 Available in Silver, Green, Yellow, Orange, Pink, Purple, and Blue Available in Silver, Green, Yellow, Orange, Pink, Purple, and Blue Available in Silver, as well as new shades of Green, Yellow, Orange, Pink, Purple, and Blue Magic Keyboard and Magic Mouse/Magic Trackpad with Lightning port Magic Keyboard and Magic Mouse/Magic Trackpad with Lightning port Magic Keyboard and Magic Mouse/Magic Trackpad with USB-C port The 2024 iMac with the M4 chip marks a much more substantial upgrade compared to the 2021 and 2023 models.
For M1 iMac users, the M4 model could be worth considering if they require enhanced performance or a richer set of features, such as hardware-accelerated ray tracing, nano-texture display option, or simply a better webcam.
One year later, the latest, M4 version of the device looks like a much more substantial upgrade, offering a dramatically more powerful Neural Engine, 16GB of memory as standard, a 12-megapixel camera with Center Stage, USB-C accessories, and a nano-texture display option.
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