ASRock B550 PHANTOM GAMING-ITX/AX Supports 3rd Gen AMD AM4 Ryzen™ / Future AMD Ryzen™ Processors motherboard

I grabbed one from the first batch stocked by Amazon UK in early July 2020. I've been running it with Ryzen 3950X and Debian 10 (backports kernel 5.6) for 24x7 scientific computing for a month and have never encountered a single glitch.There are a certain number of factors making this board one of the best choices for AM4 ITX:a) No pesky chipset fan;b) Front-side M.2 slot with heatsink;c) Front panel USB-C header;d) Centered CPU socket for heatsink compatibility;e) Support of ECC RAM;f) No daughterboards in sandwitch design;g) Excellent performance and cooling of VRM.I consider it a decent "upgrade" from the X570 ITX boards.

It's just great i use it to overclock everything on my system is just awesome wort my money so that means it worth yours and the delivery time was great 2 or week before

Awful. Received item but I couldn't use it as it came with old bios so my amd ryzen 7 5800x didn't boot. Spoke to amd and they too thought they didn't exist so it shows how long this item stock was. Had it collected by amazon/Hermes to send it back last week. Just waiting for a replacement.

I used this in a Silverstone RVZ03 build along with a Ryzen 3700X, Noctua NH65, and a Radeon RX5700XT anniversary edition. It is a fantastic board, with Intel 2.5GB NIC, WIFI on board (which I don't currently use). Fortunately I bought an SFX PSU (Silverstone 500W modular) and this allowed me to modify the mounting bracket for the Power Supply to allow access to the 4 horizontal sata ports. If I'd tried it in an RVZ01, which mounts the smaller PSU in the same horizontal position, the hard edge of the PSU would have sat up right against the sata ports. This would also be a problem with an ATX PSU in either model of case, and likely the FTZ01 too. I used both NVMe slots (one front and one back), but have space for 4x2.5 drives internally, one of which is currently in use.The only gotcha apart from this is for the Audio, which was only giving me 2.1 audio until I discoeverd the setting in the BIOS to enable HD audio and then 5.1 worked fine. 7.1 would require using a front port.

Arrived damaged and not able to use. Returned quickly and bought a different mobo, could've been just poor luck so don't read too much into this.

My rating however is for the board's build quality and feature-set which is great. The only thing missing is some sort of a BIOS Flashback which means that you're stuck high and dry if you receive a motherboard with an older BIOS, or if you don't have a Ryzen 3000 processor with you (why would most people?). AMD can loan you a spare but there are several hoops to jump through. It was easier to return the unused board to Amazon for a refund.Caveat Emptor!

Really small and cool with all features but hard to install in itx case

a very cool little itx motherboard, pcie 4.0 output, back and front type c input, back and front m.2 ssd slot, but the price is not very friendly 😅