The 2026 Motherboards breakdown.

Capability index — the formula (audit it)

Capability is the average of the five scored axes (VRM power, connectivity, M.2 count, PCIe 5.0 storage, memory speed); value = capability² ÷ price.

No single board wins every axis — the Z890/X870E flagships dominate VRM and I/O but cost the most; mid-range X870/B850 boards match them on Gen5 M.2 and GPU support for a third the price; the budget B650 tier drops PCIe 5.0 entirely. For most single-GPU gaming builds, a mid-tier board is plenty — the top tier buys overclocking headroom and ports you may never use.

Honesty. Accuracy is priority #1. VRM amperage = Vcore phase count × per-stage rating from manufacturer/review specs (a capability proxy, not a measured thermal benchmark — actual sustained performance also depends on heatsink design). Phase notation follows the vendor (e.g. 14+2+1 = Vcore+SoC+misc); the score uses the Vcore count. Prices are mid-2026 MSRP / street where resolved and are volatile. USB4 on AMD is a chipset feature — most B850/B650 boards expose only a header (scored as no native USB4). Nothing is fabricated; unknowns stay blank.