Yes, the Gigabyte B650 EAGLE AX motherboard is compatible with the AMD Ryzen 7 7800X3D processor. Here are the key points confirming this compatibility:

- The motherboard uses socket AM5, which supports AMD Ryzen 7000, 8000 and 9000 Series processors, including the Ryzen 7 7800X3D.
- The Ryzen 7 7800X3D processor is specifically mentioned as compatible with motherboards using the AMD B650 chipset, such as the Gigabyte B650 EAGLE AX.