ASRock B550M/AC Review & Specs

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ASRock B550M/AC AM4 AMD B550 SATA 6Gb/s Micro ATX

ASRock B550M/AC AM4 AMD B550 SATA 6Gb/s Micro ATX

- ASRock

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  • Supports 3Rd Gen AMD AM4 Ryzen / Future AMD Ryzen Processors
  • 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 (Renoir) Support DDR4 4733+(OC)/ 4666(OC)/ 4600(OC)/ 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

Specifications Overview

Model B550M/AC
Release Date September 2020

* First availability for purchase, it may not correspond to the actual market launch date.

Socket AM4
Form factor Micro ATX
Chipset AMD B550
Supported Memory DDR4:
2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz 3466Mhz 3600Mhz 3733Mhz 3800Mhz 3866Mhz 4000Mhz 4133Mhz 4200Mhz 4266Mhz 4333Mhz 4400Mhz 4533Mhz
* High clock speeds may require enabling the XMP profile in the motherboard BIOS
** RAM support may also depend on the CPU memory controller
ECC RAM Support
* ECC memory support also depends on the CPU memory controller
Audio Chipset Realtek ALC1200
Audio Channels 7.1 Channels
LAN Chipset Realtek RTL8111H
Max LAN Speed 10/100/1000Mbps
SLI Support
CrossFire Support
RAID Support
Back I/O Ports
  • 2 x Antenna Ports
  • 1 x PS/2 Mouse/Keyboard Port
  • 1 x HDMI Port
  • 4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports ESD Protection)
  • 2 x USB 2.0 Ports (Supports ESD Protection)
  • 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
  • HD Audio Jacks: Line in / Front Speaker / Microphone
Wireless LAN
Wi-Fi Generation 5
PCI-Express x16 Slots 2
PCI-Express x4 Slots 0
PCI-Express x1 Slots 1
SATA 6 Gbps Ports 4
SATA Express Ports 0
M.2 Ports 1
M.2 Devices support
  • 2280 - M Key
RAM Slots 4
Maximum Supported RAM 128GB
Onboard USB 2.0 2
Onboard USB 3.2 Gen 1 2
Onboard USB 3.2 Gen 2 0

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      Integrated Graphics: None

      CPU Cores: 8

      CPU Threads: 16

      CPU Clock Rate: 3800MHz

      CPU Turbo Clock Rate: 4700MHz

      TDP: 105W

      CPU Cooler included:

      Manufacturing Process: 7 nm

      Maximum Supported Memory: 128GB

      Cache L3: 32MB

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      Supported Memory: DDR4-2133 / 2400 / 2666 / 2800 / 2933 / 3000 / 3200 / 3333 / 3400 / 3466 / 3600 / 3733 / 3866 / 4000 / 4133 / 4266 / 4400 / 4500 / 4600 / 4700 / 4800 / 5000 / 5133 / 5333

      ECC RAM Support:

      Audio Chipset: ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4082

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      LAN Chipset: 2 x Intel I225-V 2.5Gb Ethernet

      Max LAN Speed: Dual 10/100/1000/2500Mbps

      SLI Support:

      CrossFire Support:

      RAID Support:

      Back I/O Ports: 2 x Thunderbolt 4 USB Type-C port(s), 6 x USB 3.2 Gen 2 port(s) (6 x Type-A), 2 x USB 2.0 port(s) (2 x Type-A) , 1 x HDMI port, 1 x ASUS Wi-Fi Module, 2 x Intel I225-V 2.5Gb Ethernet, 5 x Gold-plated audio jacks, 1 x Optical S/PDIF out port, 1 x BIOS FlashBack button , 1 x Clear CMOS button

      Wireless LAN:

      Wi-Fi Generation: 6

      PCI-Express x16 Slots: 3

      PCI-Express x4 Slots: 0

      PCI-Express x1 Slots: 1

      SATA 6 Gbps Ports: 6

      SATA Express Ports: 0

      M.2 Ports: 4

      M.2 Devices support: 2242 / 2260 / 2280 / 22110 - M Key (Intel 11th Gen only), 2242 / 2260 / 2280 - M Key, 2242 / 2260 / 2280 - M Key, 2242 / 2260 / 2280 / 22110 - M Key (Intel 11th Gen only)

      RAM Slots: 4

      Maximum Supported RAM: 128GB

      Onboard USB 2.0: 2

      Onboard USB 3.2 Gen 1: 2

      Onboard USB 3.2 Gen 2: 0

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