I recently built a new system with an Asus b450-f I have had no issues with it and it supports Ryzen 3000 out of the box. You can get it on sale for roughly $100. If you want to spend more on your Motherboard, I would get a Ryzen 7 2700 because it has 2 more cores, and it performs just as well in games. btw you need a graphics card as the Ryzen processors don't have integrated graphics like Intel chips (the only Ryzen chips with integrated graphics are the Ryzen 3 3200g and the 3400g) but both run pretty hot with a stock cooler.