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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

  • CPU Socket TypeAM4
  • CPU Type- Supports AMD AM4 Socket Ryzen 3000, 3000 G-Series, 4000 G-
  • ChipsetAMD B550
  • Number of Memory Slots4x288pin (DDR4)
  • Memory Standard- AMD Ryzen series CPUs (Vermeer) support DDR4 4533+(OC)/446
  • Maximum Memory Supported128GB
  • 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.

Highlights

  • 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

Specifications

BrandASRock
ModelB550M Pro SE
CPU Socket TypeAM4
CPU Type- 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.
ChipsetAMD B550
Number of Memory Slots4x288pin (DDR4)
Memory Standard- 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
Maximum Memory Supported128GB
Memory FeatureSupports Extreme Memory Profile (XMP) memory modules
PCI Express 4.0 x16AMD Ryzen series CPUs (Vermeer and Matisse)
- 2 x PCIe x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode)*
AMD Ryzen series APUs (Cezanne and Renoir)
- 2 x PCIe x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode)*
AMD Ryzen series APUs (Picasso)
- 2 x PCIe x16 Slots (PCIE1: Gen3x8 mode; PCIE3: Gen3 x4 mode)*
* Supports NVMe SSD as boot disks
- Supports AMD CrossFire
PCI Express x11 x PCIe 3.0 x1 Slot (PCIE2: x1 mode)
Serial ATA (SATA)4 x SATA 6Gb/s
M.2CPU:
- 1 x Hyper M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode (with Vermeer, Matisse) or Gen3x4 (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 Gen3x2 (16 Gb/s) modes*
* Supports NVMe SSD as boot disks
SATA RAID0/1/10
Audio Chipset7.1 CH HD Audio (Realtek ALC897 Audio Codec)
Audio Channels7.1 Channels
LAN ChipsetDragon RTL8125BG
- Supports Dragon 2.5G LAN Software
- Smart Auto Adjust Bandwidth Control
- Visual User Friendly UI
- Visual Network Usage Statistics
- Optimized Default Setting for Game, Browser, and Streaming Modes
- User Customized Priority Control
Max LAN Speed2.5Gbps
Back I/O 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- 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)
Other Connectors- 1 x SPI TPM Header
- 1 x Power LED and Speaker Header
- 2 x RGB LED Headers*
- 2 x Addressable LED Headers**
- 1 x CPU Fan Connector (4-pin)***
- 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)****
- 1 x Front Panel Audio Connector
* Support in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip
*** CPU_FAN1 supports the fan power up to 1A (12W).
**** CHA_FAN1~3/WP support the fan power up to 2A (24W).
**** CHA_FAN1~3/WP can auto detect if 3-pin or 4-pin fan is in use.
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Power Pin- 1 x 24 pin ATX Power Connector
- 1 x 8 pin 12V Power Connector
Windows 11Supported
FeaturesRock-Solid Durability
- 8 Power Phase
- Pre-Installed I/O Shield
Ultrafast Connectivity
- 2.5G LAN
Software
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC
* These utilities can be downloaded from ASRock Live Update & APP Shop.
UEFI
- ASRock Full HD UEFI
- ASRock Instant Flash
Package Contents- 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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