Is this a decent hardware for Hackintosh?

Yes, your hardware configuration with an Intel i5-7400 CPU, 8GB of RAM (upgradeable to 16GB), a 128GB SATA SSD, and Intel UHD Graphics 630 is decent for running a Hackintosh. While it may not be the most powerful system, it should be capable of running macOS with iATKOS Project, especially if you're not planning to perform resource-intensive tasks.

Here are some considerations:

1. CPU: The i5-7400 is a capable processor for general usage and should work well with macOS. Just ensure that you have the appropriate power management configured in your Hackintosh setup for optimal performance.

2. RAM: While 8GB of RAM is the minimum requirement for macOS, having 16GB would provide smoother multitasking and better performance, especially if you plan to run multiple applications simultaneously.

3. SSD: Using an SSD as your primary storage is an excellent choice for macOS, as it will result in faster boot times and snappier system performance.

4. GPU: The UHD Graphics 630 is integrated graphics, and it should work fine with macOS. However, if you plan to use graphics-intensive applications or need better performance, consider a dedicated GPU compatible with macOS and your Hackintosh setup.

5. macOS Compatibility: Ensure that you choose the appropriate version of macOS from the iATKOS Project that is compatible with your hardware and preferences. Some versions may require specific configurations and kexts to work optimally.

6. Driver and Kext Compatibility: Make sure you have the necessary drivers and kexts for your hardware components, such as audio, network, and graphics. These are essential for a smooth Hackintosh experience.

7. Backup: Always back up your important data before attempting to install or update macOS on your Hackintosh.

8. Community Support: Join Hackintosh forums or communities where you can find help, guides, and solutions for specific hardware and macOS versions.

Overall, your hardware is a reasonable starting point for a Hackintosh, and with proper setup and configuration, you should be able to enjoy macOS on your system. Just be aware of any specific challenges or compatibility issues related to your hardware and chosen macOS version.