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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  • Ghan - Tuesday, June 16, 2020 - link

    Right now, it seems more like B for Backordered. They may be priced a bit high, but the demand still seems to be there. Reply
  • yannigr2 - Tuesday, June 16, 2020 - link

    This is a great article but it needs a follow up with a table for every motherboard explaining how they use the PCIe lanes in conjunction with M2 and SATA slots. It seems that motherboard makers are totally f up(sorry for the expression) the more reasonably priced models in that area. Reply
  • romrunning - Tuesday, June 16, 2020 - link

    Does anyone know if the boards that have the Intel i225-V are shipping with the fixed hardware (v2)? Reply
  • R3MF - Tuesday, June 16, 2020 - link

    +1 Reply
  • mooninite - Tuesday, June 16, 2020 - link

    Wow, another broken Intel NIC? I wish motherboards would stop using Intel NICs. Reply
  • mooninite - Tuesday, June 16, 2020 - link

    After Googling it looks like v2 is not fixed either... a v3 is coming out. Time to buy Realtek. Reply
  • romrunning - Wednesday, June 17, 2020 - link

    Which is hilarious - I remember when Realtek was the worst when it came to NICs, and Intel/3Com was the standard. :) Reply
  • WaltC - Wednesday, June 17, 2020 - link

    Yes, indeed...;) My x570 Master has an Intel gigabit & a realtek 2.5gb. It's amusing because my interface is an EWAN that tops out at 1Gb, but I thought I'd try the realtek just to see and then I forgot about it...;)...Seems every bit as stable as the Intel--still on it, lol...;) Six of one, half-dozen of another. Reply
  • eastcoast_pete - Tuesday, June 16, 2020 - link

    Thanks Ian and Gavin! One question, related to a likely use case for B550 mini ITX or mATX Boards: is it true that AMD will, at least initially, limit Ryzen 4000 APUs to OEMs? If that is so, I am definitely not interested in a B550 board in those form factors, and I don't think I am alone here. An answer is appreciated - thanks! Reply
  • mrvco - Tuesday, June 16, 2020 - link

    I'm just here for the Next mini-ITX boards. I'm liking the Aorus Pro AX quite a bit. Reply

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