The Guru of 3D reviewed the MSI B450 Tomahawk
A quote from the article:
We review the MSI B450 Tomahawk, based on the new B450 chipset it is aimed at for Ryzen processors, and in specific the new Ryzen 2000 / Zen+. The new B450 series chipset based board offer some more appealing value, as budget wise this board sells at a sub 109,- USD/EUR price point. It is a lovely looking value alternative and hey, there's very little LED bling as also.MSI B450 Tomahawk Review
Yeah, Zen+ was launched in April, aka Ryzen 2000 or 12nm optimized Ryzen processors, the 'refresh' SKUs so to say. The new 12nm Zen+ processors will work fine with your X370 chipset based motherboard and vice versa, however, AMD launched the X470 chipset alongside these new Zen+ processors. The new chipset offers small improvements in combo with the new 12nm products. For example, to better facilitate XFR2 options. It has been a year already ever since AMD launched the first generation Ryzen processors. It had a bit of a rocky launch with the inter-core latency discussion a 1080p gaming performance as well as memory support. But the tide definitely turned for AMD as more and more people are considering to purchase an AMD processor-based PC, for their next purchase. The memory compatibility issues are mostly all gone, of course, we'll look at game performance in this article as well. But yes, things are looking good. The new 12nm processor generation can be clocked a notch higher. The upper range frequencies at 4.2~4.3 now are feasible, that also means that on the lower end of the spectrum, AMD is now capable to increase base-clock performance ion the more high-end parts. All these little tweaks bring the benefit of an overall faster processor series. Add to that improved memory latency and improved XFR2 ranges and you'll notice that the new ZEN+ generation now has become a really viable and more competitive product. So the ones that have not made a move towards AMD Ryzen just yet, now potentially could or will.