MSI B550-A Pro

The last in an interesting B550 product stack from MSI is the brands professional-focused budget model, the B550-A Pro. In recent years, the A-Pro model has been one of MSI’s most basic designs and cheapest with the B450-A Pro costing just $90 at launch. The MSI B550-A Pro builds upon a basic all-black design with some notable inclusions including two M.2 slots, six SATA ports, a Realtek Gigabit Ethernet controller and a Realtek ALC892 HD audio codec.

The MSI B550-A Pro is an all-black ATX sized model which sits as the brands entry-level B550 model. Included in the feature set are two full-length PCIe slots which operate at PCIe 4.0 x16, and PCIe 3.0 x4, with two additional PCIe 3.0 x1 slots. The A-Pro has support for up to DDR4-4400 memory, with a total of four memory slots which allow users to install up to 128 GB. Looking at storage capability, there is a pair of M.2 slots with the top slot operating at PCIe 4.0 x4, and the second slot at PCIe 3.0 x4, with six SATA ports for conventional the installation of conventional SATA devices.

Focusing on the rear panel of the B550-A Pro, MSI includes two USB 3.2 G2 ports including a Type-A and Type-C, with two USB 3.2 G1 Type-A and four USB 2.0 ports. For users looking to pair this model up with a Ryzen APU, there is a pair of video outputs including a DisplayPort 1.4 and HDMI output, with a small BIOS Flashback button. A budget-focused Realtek controller pairing including a Realtek RTL811H Gigabit Ethernet controller and Realtek ALC892 are preset, with the latter which spawns five 3.5 mm audio jacks and a S/PDIF optical output on the rear panel.

Out of MSI’s B550 product stack and where pricing seems to be going currently on budget motherboards, the B550-A Pro has an MSRP of $140. If compared directly against the B450-A Pro this replaces, there is a stark difference in price point and feature set, with the only real upgrades in specifications coming through PCIe 4.0 support via the CPU, an extra M.2 slot and through better memory capability. This model above most others paints the discrepancy between what an entry-level board cost 2-years ago compared to what actually one costs currently.

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  • Operandi - Tuesday, June 16, 2020 - link

    Looks like some nice mATX versions this round, nice!
  • YB1064 - Thursday, June 18, 2020 - link

    I was hoping to see a $75-$90 board.
  • kenjiwing - Tuesday, June 16, 2020 - link

    Fortunately, this component is a unique motherboard among B550 and well worth reading up on [add link].
    Needs to be edited.
  • anirudhs - Tuesday, June 16, 2020 - link

    There's a noise sensor which can adjust fan speed for maximum quietness with good thermals. Saw it on the KitGuruTech video. The noise sensor isn't there to spy on you though.
  • PeterCollier - Wednesday, June 17, 2020 - link

    The quality of the editing here is shit tier. Seriously, just run the articles through Grammarly before publication. It's free and it spots plenty of errors.
  • Heavenly71 - Tuesday, June 16, 2020 - link

    Sadly none of the mITX boards have more than 6 external USB ports. My old ASUS mITX has 8! And in really small mITX cases you can't add a bracket with more USB, because the two brackets are already used by the gfx card. Guess I have to wait for an enthusiast mITX board )-:
  • damianrobertjones - Tuesday, June 16, 2020 - link

    Or, just maybe, get a usb dongle with 4 ports?
  • Mr Perfect - Tuesday, June 16, 2020 - link

    That is disappointing. The number of USB devices people need to plug in can't be dropping, surely? I know I've got more now then even a year ago.
  • rrinker - Tuesday, June 16, 2020 - link

    Are they really going up? I have 2 USB devices plugged in to my system - a keyboard and a mouse. I occasionally plug a USB stick in one of the front ports to transfer files. My phone and tablet sync over wifi, they don't get plugged in. I have a charger behind my desk and a cable to charge them. My printer is on the network.
    The one place I DO need lots of USB ports is also the place where I have a small cube case machine, with no discreete GPU, because it doesn;t need one. On that one I added a USB PCI card to get enough ports. In addition to the keyboard and mouse, that machine is on my workbench where it connects to several electronic test instruments and I have multiple cabled for programming microcontrollers. I also have a USB microscope for board inspection. And then I have 3 more USB devices connected for my other hobby that shares the bench. Plus a front port kept free for USB sticks.
    So the use case I have for more USB has the PCI slots open to add expansion cards, the use case where I have a discrete GPU eating up the slot space doesn't need an excess of USB ports.
  • DigitalFreak - Tuesday, June 16, 2020 - link

    I use 3 USB 3.0 ports just for my Oculus Rift

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