Best answer: No. While there will be new motherboards available with the X570 chipset to go with the third generation of Ryzen processors, if you're upgrading from a previous generation you can just reuse your motherboard as long as you update the BIOS.
Top AMD motherboard: MSI Gaming Plus X470 ($130 at Amazon)
Update before you buy
As with the jump from first- to second-generation Ryzen processors, your current motherboard will support the new Ryzen 3000 series processors thanks to the maintained standard of the AM4 platform. What's required to ensure compatibility is a BIOS update.
The kicker is that if you're upgrading, you need to remember to download the updates first. With your current Ryzen processor installed, grab the latest updates from your motherboard manufacturer and install. Then install the new Ryzen 3000 processor.
It's also a good idea to make sure you have the latest AMD chipset drivers for your motherboard as well. You can get these directly from AMD.
Where to get the latest BIOS for your motherboard
Exact locations vary but the first place to go is the support or downloads section on the website of your motherboard manufacturer. Whether it's Gigabyte, ASUS, MSI, ASRock or another brand, there will be a dedicated support portal available to grab fresh BIOS updates.
In some cases, with Gigabyte for example, the updates may already be available to support Ryzen 3000 ahead of the July 7 launch. There's no time like the present to go and do that.
X570 motherboards will have PCIe 4.0
If you're building a new Ryzen PC, however, there are plenty of reasons just to get one of the new X570 chipset motherboards. For starters, if you don't have access to a current Ryzen processor, getting the necessary updates installed isn't going to come all that easy.
X570 will have a range of benefits, though, and one of those is support for PCIe 4.0. This in itself is a big deal, as it significantly increases the bandwidth available for graphics cards, solid-state drives (SSDs), and other internal components.
X470 motherboards can be updated to offer limited PCIe 4.0 support, Gigabyte's recent release to support the Ryzen 3000 processors also brought this, but that support will be limited.
X570 is the way to go for the best performance, albeit with a higher TDP than the current crop of X470 boards.
This is a great motherboard, supporting up to 64GB 3200MHz DDR RAM, the latest Ryzen processors, and coming with the X470 chipset. This board supports fast networking, armored PCIe slots, and MSI's RGB lighting system.
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