Is the PRIME B850M-K good enough for a Ryzen 9?

It will boot and run a Ryzen 9, but the board's modest VRM and cooling are better matched to mid-range chips. Under long all-core workloads a high-core Ryzen 9 can push it harder than a premium board would. For gaming and everyday use it is fine.

What does the B850 chipset give me over B650?

B850 adds PCIe 5.0 support for graphics and storage on boards that wire it up, which this one does. Otherwise it is close to B650: DDR5, AM5 socket and similar connectivity. Choose it if you want current-gen PCIe 5.0 without stepping up to X870.

Does it have Wi-Fi and USB-C?

Yes. The board includes onboard Wi-Fi and USB-C connectivity, so you don't need a separate wireless card. Check which Wi-Fi standard and how many USB-C ports your specific listing includes.

What memory should I pair with it?

Use DDR5 DIMMs, ideally a two-stick kit so you keep the rated speed and leave room to add more later. Check ASUS's memory support list for your kit before buying.

It is micro-ATX, so it fits micro-ATX and standard ATX cases. It will not fit mini-ITX cases. Confirm your case's motherboard support before ordering.

What's in the combo box?

The combo pairs the PRIME B850M-K motherboard with a Ryzen 9 processor. Accessories such as SATA cables and the CPU cooler vary by listing, so confirm the exact contents before buying.