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Green PCB Micro ATX board, silver AM4 socket, four black DDR4 slots, silver PCIe x16 slot, silver rear I/O shield

ASRock

ASRock B550M Pro SE AM4 DDR4 Micro ATX AMD motherboard

SKU CH-RPS6-KSPEM

Micro ATX board for AM4 Ryzen CPUs with DDR4 up to 128 GB, PCIe 4.0 x16, 2.5 Gb LAN, HDMI and DisplayPort 1.4

  • Processor- Supports AMD AM4 Socket Ryzen 3000, 3000 G-Series, 4000 G-
  • ChipsetAMD B550
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memory- AMD Ryzen series CPUs (Vermeer) support DDR4 4533+(OC)/446
  • Supports Ryzen 3000 to 5000 G-Series desktop processors with AM4 socket
  • DDR4 memory up to 4733 OC across four slots for 128GB capacity
  • PCIe 4.0 x16 plus PCIe 3.0 x16 and x1 slots for graphics and add-in cards
  • 5Gbps Dragon LAN with RTL8125BG controller and bandwidth management software
  • Realtek ALC897 7.1 channel HD audio with HDMI 1.4 and DisplayPort 1.4 outputs

Socket AM4 DDR4 platform

This micro-ATX motherboard uses the AMD B550 chipset and accepts Ryzen 3000, 4000 G-Series, 5000 and 5000 G-Series desktop processors. It provides four 288-pin slots for up to 128GB of DDR4 memory with XMP support. Athlon CPUs are not supported.

LAN and audio utilities

The Realtek ALC897 codec delivers 7.1-channel HD audio through the rear jacks. A Dragon RTL8125BG controller supplies 2.5Gbps LAN, while the bundled Dragon 2.5G LAN Software adds bandwidth control, usage statistics and preset modes for gaming, browsing and streaming.

PCIe 4.0 and M.2 constraints

With Vermeer or Matisse CPUs the primary x16 slot runs at Gen4 x16 and the Hyper M.2 socket reaches 64Gb/s; with Cezanne or Renoir APUs both drop to Gen3 speeds. The second M.2 socket from the chipset is limited to Gen3 x2 or SATA, and the single PCIe x1 slot remains Gen3.

How it compares

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

Price $80.99
Cheaper than about 82% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASRock
Model nameB550M Pro SE
Processor
Processor- Supports AMD AM4 Socket Ryzen 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
* Not compatible with AMD Athlon™ Processors.
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memory- AMD Ryzen series CPUs (Vermeer) support DDR4 4533+(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733(OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733(OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series APUs (Cezanne) support DDR4 4733+(OC)/4666(OC)/4600(OC)/4533(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/40
Max supported RAM128 GB
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsCPU:
- 1 x Hyper M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen4 × 4 (64 Gb/s) mode (with Vermeer, Matisse) or Gen3 × 4 (32 Gb/s) mode (with Cezanne, Renoir and Picasso)*
Chipset:
- 1 x M.2 Socket (M2_2, Key M), supports type 2280 SATA3 6.0 Gb/s & PCIe Gen3 × 2 (16 Gb/s) modes*
* Supports NVMe SSD as boot disks
SATA and RAID support0/1/10
Audio & video
Audio chip7.1 CH HD Audio (Realtek ALC897 Audio Codec)
Sound channels7.1 Channels
Connectivity
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 4.0 x16 slotsAMD Ryzen series CPUs (Vermeer and Matisse)
- 2 x PCIe x16 Slots (PCIE1: Gen4 × 16 mode; PCIE3: Gen3 x4 mode)*
AMD Ryzen series APUs (Cezanne and Renoir)
- 2 x PCIe x16 Slots (PCIE1: Gen3 × 16 mode; PCIE3: Gen3 x4 mode)*
AMD Ryzen series APUs (Picasso)
- 2 x PCIe x16 Slots (PCIE1: Gen3 × 8 mode; PCIE3: Gen3 x4 mode)*
* Supports NVMe SSD as boot disks
- Supports AMD CrossFire
PCIe x1 slots1 x PCIe 3.0 x1 Slot (PCIE2: x1 mode)
Rear panel ports- 1 x PS/2 Mouse/Keyboard Port
- 1 x HDMI Port
- 1 x DisplayPort 1.4–4 x USB 3.2 Gen1 Ports
- 2 x USB 2.0 Ports
- 1 x RJ-45 LAN Port with LED
- HD Audio Jacks: Line in / Front Speaker / Microphone
Onboard USB headers- 2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
- 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
Power
Power connectors- 1 × 24 pin ATX Power Connector
- 1 × 8 pin 12 V Power Connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Compatibility
Windows 11 supportSupported
In the box
In the box- 1 x User Manual
- 2 x SATA Data Cables
- 2 x Screws for M.2 Sockets

Questions about this item

Will my Ryzen 5000 G-Series processor fit this socket and run without a BIOS update?

The board supports AMD AM4 Socket Ryzen 5000 G-Series desktop processors. A BIOS update may be required depending on the manufacturing date of the specific board you receive.

What is the maximum system memory I can install and what speeds are supported?

Four DDR4 slots support up to 128 GB total. With a Ryzen 5000 G-Series APU the board runs DDR4 up to 4733+(OC); with a Ryzen 5000 Vermeer CPU it runs up to 4533+(OC).

How many M.2 drives can I use and which slot gives the highest throughput?

Two M.2 Key M sockets are provided. The CPU-connected M2_1 slot runs PCIe 4.0 x4 (64 Gb/s) with Vermeer or Matisse CPUs, while the chipset M2_2 slot runs PCIe 3.0 x2 or SATA.

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