Mobo works great
Update: oct 1, 2018the motherboard works fine, plenty of usb 3.0 ports (i use the pc to run an oculus rift, so i use a lot of the usb ports). I'm running a 2600x on it, with 16gb ddr4 3000 (c15) from corsair, pny 480gb nvme, 1tb ssd (evo 850), a bunch of old hard disk drives, and a zotac 1070 ti mini. The 2600x seems to be using its full precision boost 2 frequency. Feels (obviously) really fast.I wished this board was available with with a heatsink over the vrm, wifi/bluetooth, and two m.2 slots. It'd be my ideal micro atx board, as i don't want to have an atx tower (or even a small but wide atx one). I plan to use an 2700 in it, and i wanted to overclock but not very sure about how stable it'll perform with the weak vrm/no heat sink (and without holes to attach one over the circuitry).At first, i gave this motherboard a vengeful 1 star review, as its manual lacked a diagram about the power/reset button connections. This wasn't my first build, but i was just really annoyed to search for the mapping for power connections without finding it. Nevertheless, the comments about the polarity of the power button were right - it doesn't matter.Now, i'm not totally clueless about electricity and power. I'm used to reading datasheets for projects in college (i'm a computer engineering major), and i still think the lack of proper instructions for the connections - something that generally doesn't happen with sensors and other electronics parts - was frustrating, especially because i was finishing this build in a rush (it was in the middle of the night), so partly my bad. I didn't connect the fact that the power button in a computer was just a push button toggle switch and the reset, just a push button.However, i think it's elitism to think that only people who know these things should be allowed to build a pc without trouble and without professional help. It's the manual's job to help with this, as connections on the motherboard are pretty simple with the other hardware. Gosh, even applying thermal paste is something anyone can do with some care. So no: building a pc should not require professional assembly at all.To give a recent example, i built last year a pc that used the b350 version of this motherboard. That mobo's manual had a simple nice diagram for power connections, so i didn't have to think at all about what they meant when connecting everything and powering up the system.In sum, i'm not an expert, but i'm not a beginner either. So, if i wanted a simple, nice diagram for that, i imagine others would benefit from a diagram printed on the manual, as well. Just like the previous version of this mobo had.And that's my only criticism about this b450 motherboard, because the price is right. Although for those shopping for a ryzen matx mobo right now, it seems the msi mortar has the best vrms among am4's matx (with a heat sink over them, of course). It's likely a better choice for the 2700x and for overclocking the apus.Original review:incredibly enough, the manual doesn’t state how to connect the power button jumper, and the “diagram” on the motherboard is not very helpful either. Frustating. This process should never be a trial and error thing.