What motherboard suits Core i9 13900E, and how should power delivery, memory, and ports be balanced?

  The 13900E is LGA1700, so retail B660/B760 boards work, but embedded deployments should first verify the vendor CPU-support list and BIOS; industrial chassis often do better with boards carrying a long lifecycle commitment than with consumer models.

  For sustained transcoding or rendering, pick a board with cooled VRMs that can hold a long-term power target; for gaming and office use, B760-class is enough and the saved budget is better spent on M.2 and ports.