Our motherboard catalog tracks 722 boards: AM5 X870E / X870 / B850 (Asus ROG Strix, MSI MAG Tomahawk, Gigabyte Aorus), LGA1851 Z890 / B860, and Mini-ITX picks (Asus ROG Strix X870-I). Match chipset to actual feature use: X870E enables dual PCIe 5.0 x8 GPU + Gen5 NVMe; X870 is single-GPU + 5.0 NVMe; B850 saves $80 for builders who don't need overclocking or USB 4. VRM matters at the top of the CPU stack: a Ryzen 9 9950X3D will throttle on a budget A620 board's 8-phase VRM under all-core load. USB 4 / 40 Gbps is genuinely useful (single-cable docks, external GPUs); 50% of "premium" Z890 boards still ship only 10 Gbps front-panel Type-C. Avoid: ITX boards with single M.2 (storage upgrade dead-end), and Wi-Fi 6 boards in 2026 — Wi-Fi 7 is the new floor.