In the world of single-board computers (SBCs), ARM-based solutions are some of the most popular for their low power consumption and high performance capabilities. For those looking for an SBC with 8 or more CPU cores, there are many options to choose from. Here are some of the top ARM SBCs with 8+ CPU cores:

1. Raspberry Pi 4: This popular SBC comes in a variety of models, including one with an impressive 8GB of RAM and a quad-core ARM Cortex-A72 CPU. It also features dual-band Wi-Fi, Bluetooth 5.0, and Gigabit Ethernet.

2. Odroid-N2: The Odroid-N2 features a six-core ARM Cortex-A73 CPU, as well as a dual-core Cortex-A53 CPU. It supports up to 4GB of RAM and has built-in eMMC storage, as well as Gigabit Ethernet and USB 3.0.

3. NanoPi M4: The NanoPi M4 features a hexa-core ARM Cortex-A72 CPU, as well as a Mali T-860 GPU. It supports up to 4GB of RAM, has built-in Gigabit Ethernet, and includes both USB 3.0 and PCIe interfaces.

4. RockPro64: The RockPro64 features a quad-core ARM Cortex-A53 CPU and a dual-core Cortex-M4 microcontroller. It supports up to 4GB of RAM and offers a wide range of connectivity options, including Gigabit Ethernet, USB 3.0, and PCIe.

5. ASUS Tinker Board 2S: The Tinker Board 2S features a quad-core ARM Cortex-A55 CPU and a Mali-G31 GPU. It supports up to 4GB of RAM and offers a range of connectivity options, including Gigabit Ethernet, Wi-Fi and Bluetooth, and USB 3.0.

6. BeagleBoard-X15: The BeagleBoard-X15 features a quad-core ARM Cortex-A15 CPU and a dual-core Cortex-M4 microcontroller. It supports up to 2GB of RAM and includes Gigabit Ethernet, USB 3.0, and HDMI output.

7. UDOO Bolt: The UDOO Bolt features a quad-core ARM Cortex-A57 CPU and a Radeon Vega 8 GPU. It supports up to 32GB of RAM and includes Gigabit Ethernet, Wi-Fi and Bluetooth, and USB 3.1.

These ARM SBCs with 8+ CPU cores are perfect for a wide range of projects, including AI and machine learning, multimedia applications, and even as a desktop replacement. With their low power consumption and high performance, they offer an excellent balance of capabilities and energy efficiency.