The AMD B550 Motherboard Overview: ASUS, GIGABYTE, MSI, ASRock, and Others
by Dr. Ian Cutress & Gavin Bonshor on June 16, 2020 11:00 AM ESTASUS ROG Strix B550-F Gaming + Wi-Fi
The B550-F Gaming is a cheaper variant of the B550-E Gaming – significantly cheaper in fact, almost $90 if we consider the non-Wi-Fi version of the B550-F ($190). For that cost difference, the PCIe configuration is a simple PCIe 4.0 x16 rather than a bifurcated design, we lose a USB 3.2 Gen 2 port on the rear panel, and it uses 12 phases for the CPU rather than 14. There’s still the same 2.5 gigabit Ethernet, still the same SupremeFX audio with dual amps. It just goes to show how much adding bifurcation to the B550-E ($280) ends up on the final cost of the board.
The difference between the B550-F ($190) and B550-F Wi-Fi ($210) is $20, with the only difference being the use of the ASUS AX200 CNVi module and bundled antenna.
As mentioned, this board has a 12+2 phase design, with the power delivery heatsinks coming in two parts without a connecting heatpipe. The heatsink on the left is part of the rear panel cover, which has additional LEDs inside. The CPU is powered through an 8-pin and 4-pin, and the socket has four 4-pin fan headers within easy reach.
The board uses single sided latch memory slots, and to the right of these we get the 24-pin ATX power connector and the USB 3.0 header. Below this is a set of 6 SATA ports.
On the PCIe front, we start with a PCIe 4.0 x4 M.2 slot which comes with its own heatsink, followed by the PCIe 4.0 x16 slot from the CPU that has additional reinforcement. The chipset heatsink is to the right, which sort of connects to the bottom M.2 slot, which is a PCIe 3.0 x4 design from the chipset. The final full-length PCIe slot is a PCIe 3.0 x4 from the chipset.
The audio on the board is ASUS’ custom S1200A audio codec, with SupremeFX trimmings and dual amps. Along the bottom of the board we have a Thunderbolt header, two RGB LED headers, a Clear CMOS header, a thermocouple header, two 4-pin fan headers, and two USB 2.0 headers.
On the rear IO there is a clear CMOS button, two USB 2.0 ports, four USB 3.2 Gen 1 ports, a Type-A USB 3.2 Gen 2 port, a Type-C USB 3.2 Gen 2 port, a 2.5 gigabit Ethernet port (Intel I225-V), a DisplayPort, an HDMI video output, Wi-Fi antenna (on the Wi-Fi version), and audio jacks.
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althaz - Wednesday, June 17, 2020 - link
Hmm, these seem mostly...pointless? More expensive than B450 by a lot, barely cheaper than the superior X570 boards (which have more PCIe lanes, more USB ports, etc)...these really need to be $50 cheaper across the (mother)board to make sense, IMO.sing_electric - Thursday, June 18, 2020 - link
It is interesting comparing similar X570 and B550 models within the same brand (or subbrand like Asus ROG or Gigabyte Aorus). It really seems like pricing is VERY close between them.Of course, if the VRMs are comparable, then for 90%+ of users, a X570 and a B550 are basically equivalent. In some cases it's almost like you're giving the user a choice between a newer B550 board with WiFi 6 and an older X570 board with AX but more USB ports or something, for within a few bucks of the same price (if you can find them at MSRP and in stock, which really has been an issue of late.)
jrbales@outlook.com - Wednesday, June 17, 2020 - link
I was looking at the boards on morning of Jun 16th. Very few B550 boards in stock (not too unusual so soon to release) and prices were high, in the range there just a few months ago I could have bought an X570 board. However, X570s were mostly out of stock everywhere I looked, and those in stick were generally pushing $300 USD or more. I suspect either manufacturing has not completely ramped up after COVID-19 in Asia, or that there is still a shipping back-load via ocean freight bearing ships between Asia and North America. Maybe if we ever see a return to a semblance.nce of normal, prices might lower and parts return to stock,
romrunning - Wednesday, June 17, 2020 - link
Shipping is main culprit here - big problem, including extra time spent in customs at ports (like LA in the US).sing_electric - Thursday, June 18, 2020 - link
Right - In February I picked up an X570 board for ~$30 under MSRP, so equivalent B550 board (same OEM, same 'line') would actually be a few bucks more... but adds a Thunderbolt header, WiFi 6 and 2.5 gig Ethernet (in exchange for PCIe lanes/slots and USB ports, and a 2nd m.2 connector). In the end, I think the X570 was a perfectly good choice on sale.willis936 - Wednesday, June 17, 2020 - link
I love that summary table. I wish it had an entry for “8 or more USB-A ports”. I actively use 15 on my desktop. The fewer PCIe cards and hubs needed, the better imo.GNUminex_l_cowsay - Wednesday, June 17, 2020 - link
Thanks for giving detailed and, hopefully, correct information about the PCIe configurations on these boards. Unfortunately many of the motherboard manufacturers don't give that information, make the information hard to find, give wrong information, or some combination of the above with regards to PCIe configuration.Out of curiosity, what happens when you put a pcie 3.0 x4 ssd in an x2 slot when the ssd's maximum read and write rates don't fully saturate x4? Is it just limited to the ~2GB/s bandwidth of the slot or does the ssd do something worse?
Lucky Stripes 99 - Wednesday, June 17, 2020 - link
Yeah, it will transfer just a bit under 2 GB/s due to overhead. I had this same issue with my H97 board and my Samsung 970, so I opted to purchase a cheap M.2 PCIe 3.0x4 card. HD Tune showed an improvement, but not by much to notice much real world difference.Allan_Hundeboll - Wednesday, June 17, 2020 - link
What about the Gigabyte 550M s2h?It's 12$ cheaper than the ds3h, so I would like to know what gigabyte did to lower the cost.
xenol - Thursday, June 18, 2020 - link
A complaint I had in previous AMD boards was how prevalent VGA ports were. I'm glad to see they're not so prevalent this time around.