Skip to specifications
Home
THE ACTUAL PRODUCT
MSI MAG B550 TOMAHAWK motherboard, top view of the exact global model; CPU and memory are not installed
Official product image · Image source detailsProduct imagery does not establish a retailer’s bundle or condition.
MOTHERBOARDS · LOOK CLOSER

MSI MAG B550 TOMAHAWK

AM4 · ATX · DDR4 · board-only configuration · MSI global specification

ATX motherboard for supported AM4 processors, with 4 DDR4 slots and 2 onboard M.2 storage positions. Realtek RTL8125B 2.5 Gb Ethernet plus RTL8111H 1 Gb Ethernet.

Reviewed 7 Sept 2026Manufacturer specifications, not a hands-on test.
Search Amazon UKPaid affiliate linkSearch Amazon USPaid affiliate link

Search results may include other models. Check the variant, price and availability on Amazon.

As an Amazon Associate I earn from qualifying purchases.

Explore every specification
Add to my decisionExplore alternativesUpgrade from this productSuggest a correction
WHAT IT BRINGS

The useful part.

Provides separate 2.5 Gb and 1 Gb Ethernet ports alongside six SATA connections.

Manufacturer source
BEFORE YOU CHOOSE

The checks that matter.

The second M.2 slot shares resources with lower PCIe slots. This original model is distinct from the single-LAN B550 TOMAHAWK MAX WIFI.

Manufacturer source
NOTHING HIDDEN IN THE SMALL PRINT

Every specification.
With its source.

Our publishing standard
CPU socket
AM4
Conditions & context

Manufacturer specification · Match the exact CPU and required BIOS as well as the physical socket.

Source
Chipset
AMD B550
Conditions & context

Manufacturer specification

Source
Form factor
ATX: 305 × 244 mm
Conditions & context

Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing.

Source
Memory type, slots and limit
4 DDR4 DIMM slots; up to 128 GB; dual-channel unbuffered memory; A-XMP
Conditions & context

Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable.

Source
Storage interfaces
M2_1: CPU PCIe 4.0/3.0 x4 or SATA; M2_2: chipset PCIe 3.0 x4; 6 SATA 6 Gb/s ports
Conditions & context

Manufacturer specification · M.2 generation depends on the CPU. If M2_2, PCI_E2 and PCI_E3 are populated simultaneously, PCI_E3 becomes unavailable and M2_2 runs at x2.

Source
Network interfaces
Realtek RTL8125B 2.5 Gb Ethernet plus RTL8111H 1 Gb Ethernet
Conditions & context

Manufacturer specification · Two wired LAN controllers, not combined 3.5 Gb single-link throughput. No installed wireless hardware is claimed.

Source
CPU support / BIOS source
MSI lists Ryzen 5000 / 3000 (excluding Ryzen 5 3400G and Ryzen 3 3200G) / 4000 G-Series processors. Check the exact CPU support list and required BIOS before purchase; a socket match alone does not establish out-of-box compatibility.
Conditions & context

Manufacturer specification

Source
Maximum listed memory
128 GB
Conditions & context

Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable.

Source
DIMM slots
4
Conditions & context

Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities.

Source
Onboard M.2 storage slots
2
Conditions & context

Manufacturer specification · Onboard M.2 storage positions only. M.2 generation depends on the CPU. If M2_2, PCI_E2 and PCI_E3 are populated simultaneously, PCI_E3 becomes unavailable and M2_2 runs at x2.

Source
SATA storage ports
6
Conditions & context

Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. M.2 generation depends on the CPU. If M2_2, PCI_E2 and PCI_E3 are populated simultaneously, PCI_E3 becomes unavailable and M2_2 runs at x2.

Source
Onboard audio hardware
Realtek ALC1200 or ALC1220P
Conditions & context

Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised.

Source
PUT IT IN PERSPECTIVE

A choice needs a contender.

Choose another checked product in motherboards for a side-by-side comparison.

MSI B650 GAMING PLUS WIFI motherboard, oblique front view with exact model printed on the board; no CPU, RAM or accessories installedMSI B650 GAMING PLUS WIFIAM5 · ATX · Wi-Fi model · MSI global specificationCompare the two ASUS PRIME B650-PLUS WIFI motherboard with its exact model name printed on the PCB, AM5 socket, four DIMM slots and silver heatsinks.ASUS PRIME B650-PLUS WIFIAM5 · ATX · Wi-Fi model · ASUS global specificationCompare the two MSI MAG B650 TOMAHAWK WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG B650 TOMAHAWK WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MAG X870 TOMAHAWK WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG X870 TOMAHAWK WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI PRO B650-S WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO B650-S WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI B760 GAMING PLUS WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI B760 GAMING PLUS WIFILGA1700 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI PRO B550M-VC WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO B550M-VC WIFIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI PRO Z790-A MAX WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO Z790-A MAX WIFILGA1700 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI B550M PRO-VDH WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI B550M PRO-VDH WIFIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI MAG B850 TOMAHAWK MAX WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG B850 TOMAHAWK MAX WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MAG B550 TOMAHAWK MAX WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG B550 TOMAHAWK MAX WIFIAM4 · ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI B450M-A PRO MAX II motherboard, top view of the exact global model; CPU and memory are not installedMSI B450M-A PRO MAX IIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI PRO B650M-P motherboard, angled front view of the exact global model; CPU and memory are not installedMSI PRO B650M-PAM5 · Micro-ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI PRO B760M-P DDR4 motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO B760M-P DDR4LGA1700 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI MPG B550 GAMING PLUS motherboard, top view of the exact global model; CPU and memory are not installedMSI MPG B550 GAMING PLUSAM4 · ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI A520M-A PRO motherboard, top view of the exact global model; CPU and memory are not installedMSI A520M-A PROAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI PRO B650M-A WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO B650M-A WIFIAM5 · Micro-ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MAG X670E TOMAHAWK WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG X670E TOMAHAWK WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MPG X870E CARBON WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MPG X870E CARBON WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI B850 GAMING PLUS WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI B850 GAMING PLUS WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI B550-A PRO motherboard, top view of the exact global model; CPU and memory are not installedMSI B550-A PROAM4 · ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI B650M GAMING PLUS WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI B650M GAMING PLUS WIFIAM5 · Micro-ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI PRO A620M-E motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO A620M-EAM5 · Micro-ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MAG X870E TOMAHAWK WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG X870E TOMAHAWK WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI PRO H610M-G DDR4 motherboard, top view of the exact global model; CPU and memory are not installedMSI PRO H610M-G DDR4LGA1700 · Micro-ATX · DDR4 · board-only configuration · MSI global specificationCompare the two MSI MEG X870E GODLIKE motherboard, top view of the exact global model; CPU and memory are not installedMSI MEG X870E GODLIKEAM5 · E-ATX · DDR5 · board-only configuration · MSI global specificationCompare the two MSI MAG Z890 TOMAHAWK WIFI motherboard, top view of the exact global model; CPU and memory are not installedMSI MAG Z890 TOMAHAWK WIFILGA1851 · ATX · DDR5 · board-only configuration · MSI global specificationCompare the two
Product image sources