Quick Answer
For the Ryzen 7 9800X3D, a good B650 board is the value pick and X670E is optional; the X3D chip's gaming performance does not depend on a premium chipset, only on a solid VRM and DDR5-6000 support. Choose X670E only for extensive PCIe 5.0 expansion or heavy multitasking I/O.
Matching A Board To The 9800X3D
The 9800X3D is the fastest gaming CPU, but its strength comes from 3D V-Cache, not the chipset. A mid-range B650 board with a capable VRM runs it at full speed with DDR5-6000. The 9800X3D supports overclocking, so if you intend to tune it, pick a B650 board with a stronger VRM or a mid X670E, but you still do not need the flagship tier.
The extra PCIe 5.0 lanes and M.2 slots on X670E help only if you run multiple Gen 5 drives and add-in cards together, which is rare in a gaming build.
Cooling And Memory Matter More
The 9800X3D runs warm and rewards good cooling, so a 240mm AIO or strong air cooler keeping it under 80C protects its boost more than any board feature. Pair it with a 32GB DDR5-6000 CL30 kit and enable EXPO. Confirm the board's BIOS supports the 9800X3D and the kit is on the QVL. Those choices affect performance far more than the chipset name.
FAQ
Does the 9800X3D need an expensive motherboard?
No. A quality B650 board with a good VRM runs it at full speed. X670E adds expansion most gamers never use, so it is optional rather than necessary.
Should I overclock the 9800X3D?
You can, since it is unlocked, but the gains are modest. If you plan to, pick a board with a stronger VRM. Most gamers get best results from cooling and DDR5-6000 instead.
What cooler suits the 9800X3D?
A 240mm AIO or a high-end air cooler. The chip is heat-sensitive, and keeping it under 80C protects its boost clocks more than any motherboard feature.
Pair the 9800X3D at Evetech with a capable B650 board, a 240mm AIO and a 32GB DDR5-6000 kit for full gaming performance without overspending on the chipset.