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Dark green Micro ATX motherboard with four DDR4 slots, silver AM4 socket, single PCIe x16 slot, two M.2 heatsinks

GIGABYTE

GIGABYTE GA-B550M PRO-P AMD motherboard

SKU CH-P873-TKMNV

Micro-ATX AM4 board with B550 chipset, 128 GB DDR4 capacity, 2.5 GbE LAN, Realtek ALC1200 audio and PCIe 4.0 support for Ryzen 3000 and 5000 CPUs

  • ChipsetAMD B550
  • Max supported RAM128 GB
  • PCI slots1 PCI Express x16 slot (PCIEX16), built into the CPU. AMD Ry
  • SATA and RAID support2XM.2 interface, 4xSATA III interface
  • Audio chip1. Built-in Realtek ALC1200 chip ® 2. Support High Definitio
  • Ethernet controllerBuilt-in Realtek 2.5GbE network chip (2.5 Gbit/1 Gbit/100 Mb
  • Supports up to 128 GB DDR4 memory capacity
  • 5 GbE LAN for high-speed wired networking
  • Realtek ALC1200 audio with 7.1 channel support
  • USB 3.2 Gen 2 Type-C port on rear I/O
  • Micro ATX form factor measures 24.4 cm square

AMD B550 Micro-ATX motherboard for Ryzen builders

The GIGABYTE GA-B550M PRO-P fits AMD AM4 processors including Ryzen 3000 and 5000 series CPUs. It delivers four DDR4 DIMM slots supporting up to 128 GB of system memory. A single PCI Express x16 slot connects directly to the CPU for graphics or high-speed add-in cards.

Sustained load behaviour

The onboard Realtek 2.5GbE network chip maintains 2.5 Gbit, 1 Gbit or 100 Mbit links without a discrete card. Realtek ALC1200 audio drives up to 7.1 channels and S/PDIF out for extended sessions. Chipset cooling is passive so airflow across the VRM area determines thermal headroom.

Straightforward AM4 install with minimal accessories

The board measures 24.4 cm square and mounts in any Micro-ATX compatible chassis using standard standoffs. Only one SATA cable and the rear I/O shield are included so builders must source additional cables and CPU cooler brackets. Verify AM4 cooler clearance against the VRM heatsink before ordering.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $178.99
Cheaper than about 57% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameGIGABYTE
Product lineGIGABYTE GA-B550M AORUS PRO-P
Processor
ChipsetAMD B550
Memory
Max supported RAM128 GB
Storage
SATA and RAID support2XM.2 interface, 4xSATA III interface
Audio & video
Audio chip1. Built-in Realtek ALC1200 chip ®
2. Support High Definition Audio
3. Support 2/4/5 1/7.1 channels
4. Support S/PDIF output
Connectivity
Ethernet controllerBuilt-in Realtek 2.5GbE network chip (2.5 Gbit/1 Gbit/100 Mbit)
Ports & slots
Onboard USB headersBuilt-in CPU:
1.4 USB 3.2 Gen 1 ports on the rear panel
Built-in chipset:
1 USB Type-C ™ interface on the rear panel, supporting USB 3.2 Gen 2
3.1 USB 3.2 Gen 2 Type-A interface (red) on the rear panel
2 USB 3.2 Gen 1 ports need to be connected from the USB socket in the main board via a cable
4 USB 2.0/1 ports need to be connected from the USB socket in the main board via a cable
Built-in chipset + 1 USB 2.0 Hub.
6.4 USB 2.0/1 ports on rear panel

Questions about this item

How loud or hot does the board get when the 2.5 GbE LAN and Realtek ALC1200 audio run continuously?

The motherboard uses a passive chipset heatsink and the Realtek 2.5 GbE plus ALC1200 audio controllers draw little power, so noise and heat stay low during all‑day operation.

Which essential components are not in the box and must already be owned for the system to boot?

The package contains only the board, one SATA cable and the I/O shield; you must supply an AM4 Ryzen processor, DDR4 memory modules, storage drives and an ATX power supply.

Will my existing SATA III SSD and hard drive work at full speed on the four SATA III ports?

Yes, the four SATA III interfaces run at the standard 6 Gb/s rate, so any SATA III SSD or mechanical drive will operate at its rated throughput.

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