B850 vs X870 vs X870E: 44 vs 36 Lanes, $450 Gap [2026]
Picking a CPU used to be the hard part of an AMD build. In October 2026, the harder question is which AM5 motherboard chipset to pair it with, now that AMD sells four current tiers — B840, B850, X870, and X870E — each with a different mix of PCIe 5.0 lanes, USB4 support, and SATA…