Best motherboards for AMD Ryzen 9 3900X in 2021

The X570 chipset replaced the last-gen X470 and is now the go-to chipset for the Ryzen 9 3900X. X570 motherboards also bring additional benefits like PCIe 4.0 support and Wi-Fi 6. This ASUS board has Gen 4 M.2 slots capable of unidirectional transfer speeds up to 64GB/s and plenty of RGB lighting options to boot.

While not quite as advanced as our top pick, the A520 AORUS Elite from Gigabyte is still worth considering for your Ryzen 9 3900X. It doesn't come with PCIe 4.0 support but comes with a decent VRM setup, M.2 slot, and will work perfectly fine with your Ryzen 3000-series CPU. You'll also save some money left for other components.

The B550 chipset is a little less advanced than the X570 sibling, but it's still worth considering for a new build. This board from ASRock supports Ryzen 3000-series CPUs and provides enough features for the 3900X, including a 14-phase power delivery design for stable overclocking.

This ASUS board is one that would suit someone who wants the latest chipset features on a more basic platform. It's got a lot going for it, too, with metal heatsinks for the VRMs and other high-quality components. Major differences between the X570-P and our top recommended X570-E is the lack of SLI support, no 2.5Gb LAN, and different ports on the rear I/O.

Okay, time for the big one. This ASUS motherboard is a perfect match for the Ryzen 9 3900X. It houses plenty of features, including a heatsink block that can be connected to your custom water-cooling loop. It's quite literally insane.