We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green ATX motherboard with silver heatsinks and black slots

ASRock

ASRock B550 PRO4 AM4 AMD motherboard

SKU CH-9EWV-2GDMX

ATX board with AM4 socket for Ryzen CPUs, four DDR4 slots up to 128 GB, PCIe 4.0 x16 and Gen4 M.2, six SATA 6.0 Gb/s ports, 7.1 audio and Gigabit LAN

  • ProcessorSupports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors
  • ChipsetAMD B550
  • Form factorATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryAMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC)/ 4466
  • Supports 3rd Gen AM4 Ryzen and future AMD Ryzen processors
  • Dual-channel DDR4 memory up to 128 GB across four slots
  • PCIe 4.0 x16 slot with Matisse CPUs for high-speed graphics and NVMe storage
  • Six SATA 6.0 Gb/s ports with RAID 0, 1, 10 support
  • Realtek ALC1200 7.1-channel audio and RTL8111H LAN

AM4 Socket B550 Board

The ASRock B550 PRO4 is an ATX motherboard built around the AMD B550 chipset and AM4 socket. It supports 3rd Gen AMD AM4 Ryzen processors and future AMD Ryzen processors with a possible BIOS update. The board provides four 288-pin DDR4 memory slots running in dual-channel mode up to 128GB. It targets builders who want PCIe 4.0 graphics and NVMe support on a mainstream platform.

Matisse or Renoir CPU Fit

This board suits owners of Ryzen Matisse CPUs who need a PCIe 4.0 x16 slot and a Gen4 M.2 socket for fast NVMe storage. Renoir APU users can also install here but will operate the primary x16 slot and the top M.2 at PCIe 3.0 speeds. Buyers with a Ryzen 5 3400G or Ryzen 3 3200G should look elsewhere because those APUs are explicitly not compatible.

Rear I/O and Expansion Extras

The rear panel includes HDMI and D-Sub video outputs driven by the APU integrated Radeon Vega graphics, Realtek ALC1200 7.1-channel audio, and a Realtek RTL8111H Gigabit LAN port. Six SATA3 6.0Gb/s connectors support RAID 0, 1, 10 alongside two PCIe 3.0 x1 slots and a Key E M.2 2230 socket for Wi-Fi or Bluetooth modules. Note that M2_3 and SATA3_5_6 share lanes so only one can be active.

How it compares

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

Price $95.99
Cheaper than about 77% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASRock
Model nameB550 PRO4
Processor
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryAMD 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*
* For Ryzen Series CPUs (Picasso), ECC is only supported with PRO CPUs.
Memory channelsDual Channel
Storage
M.2 slots1 x Hyper M.2 Socket (M2_1), supports M Key type 2260/2280/22110 M.2 PCI Express module up to Gen4 × 4 (64Gb/s) (with Matisse) or Gen3 × 4 (32Gb/s) (with Renoir)**
1 x M.2 Socket (M2_3), supports M Key type 2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x2 (16Gb/s)**
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC1200
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Ports & slots
PCIe x1 slots2 x PCI Express 3.0 x1 Slots
Additional slots1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module
Rear panel portsAntenna Bracket
1 x PS/2 Mouse/Keyboard Port
1 x D-Sub Port
1 x HDMI Port
1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)
4 x USB 3.2 Gen1 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
Onboard USB headers2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
Power
Power connectors1 × 24-pin ATX Power Connector
1 × 8-pin 12 V Power Connector
1 × 4-pin 12 V Power Connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

Will a Ryzen 5000 series processor work out of the box?

A BIOS update may be required before a Zen 3 Ryzen 5000 CPU will post. Check the ASRock support page for the latest firmware and update instructions.

Can I run four sticks of DDR4 at 3200 MHz?

The board has four 288‑pin slots supporting dual‑channel DDR4 up to 128 GB. 3200 MHz is a native speed for Matisse CPUs; higher frequencies are possible with overclocking.

Does the primary M.2 slot share bandwidth with any SATA ports?

The Hyper M.2 socket (M2_1) runs at Gen4 x4 with Matisse or Gen3 x4 with Renoir and does not disable SATA ports. The second M.2 slot (M2_3) shares lanes with SATA3_5 and SATA3_6.

More in Motherboards for AMD CPUs

Similar items