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

Stabiles Board

Tiene un gran soporte para la mejor tecnología, la tengo montada como n un Ryzen 5700X, 4TB en SSD, 64 GB en ram y activado el perfil XMP en 3400Mhz son problema y un Radeon 7800XTX. Y lo mueve todo de maravilla a demás de tener una estética impecable. La mega recomiendo.

Aparentemente muy bien acabada y buena calidad. En realidad todo funcionó bien hasta que en un año y 2 meses se le gastó la pila de la bios. Me puse en contacto con el servicio técnico y me enviaron instrucciones de como desmontar el disipador para acceder a la pila. Como estaba en garantía, decidí que era mejor no desmontar nada. Me puse en contacto con Amazon y me ofrecieron devolverla y reembolsarme el dinero. Así que eso hice, y me compré una Aorus Pro de Gigabyte. Que es lo que no me ha gustado y que hace que no la haya vuelto a comprar: los conectores sata están de lado en lugar de hacia arriba. Esto es un factor determinante para, si tienes una caja muy pequeña como la mía, te límite hasta el punto de no poder conectar ningún disco duro, ya que en mi caso pegan con la fuente de alimentación y, a pesar de usar el conector plano, forzaba el plástico de la placa y tarde o temprano terminaria rompiendo o desmontandolo. Así que solo por eso y no tener que desmontar disipadores, estando en garantia la cambié por la Gigabyte. De momento he mejorado en poder enchufar un disco duro extra a los M2. Factor determinante a tener en cuenta ya que compras una placa itx para tener una caja pequeña y si con eso pierdes la posibilidad de poner discos...

Awaiting a replacement, will give a full review in the next week. (REPLACEMENT RECEIVED) Excellent board, for my use-case. I am not planning on doing any overclocking, and in fact, might try undervolting if anything at all. ASRock's polychrome sync application works just fine, to control RGB on the motherboard and GPU. VRM Temps seem good. The availability of USB ports is really what drew me to this board, in addition to the internal USB-C header present on the board. Would recommend for any Zen 2 or Zen 3 Ryzen sff build. Oh yeah, and the Bluetooth and Wifi capability is also excellent. Getting better download/upload speeds compared to my previous ASUS PCI internal card. (PS) I packed this Mobo in to the Velkase 5 chassis, and I must say, what a great board for an ITX, sff build. The only oversight and thing to look out for this with case, is that the front panel of this case directly interferes with the SATA ports that are angled towards the front of the case, instead of straight up. Otherwise, everything was just fine.

What a dream of a board coupled with my Ryzen 5 5600GT processor, did not need bios update to boot and post. I eventually did update the bios because I was planning to sell the system I was building. SFF mini-itx build, mother board performs well, lots of bios and overclocking options, more than I can even understand and I have built my own systems since the 90s. Runs cool, no issues, I almost didn't buy the board because of negative comments but I have nothing bad to say about this board and I have had nothing but positive experiences with it.