





Asrock B550M PRO4 Motherboard
- CPU socket
- AM4
- Chipset (MB)
- AMD B550 MB
- Form factor
- Micro ATX
- Supported memory
- DDR4
- Number of memory slots
- 4
Description
Asrock B550M PRO4 is a micro ATX motherboard for AM4, aimed at a stable mid-range Ryzen build – gaming or work – without unnecessary extras, but with the important features in place. The AMD B550 chipset gives you access to modern features and PCIe 4.0 for graphics cards or NVMe SSDs. With 4 slots for DDR4 and support for up to 128 GB RAM, you have enough room to start budget-friendly and upgrade later. Add the built-in audio with Realtek ALC1200 and the decent rear panel with many USB ports, and you get a quite balanced foundation for a compact computer.
What you get: AM4 motherboard that supports Ryzen 3000, 4000 G-Series, and 5000 processors, so you can combine from budget CPUs to serious 8–12-core chips. The memory is DDR4, in dual-channel mode, with frequencies up to 4733+ MHz (OC), which helps for better performance with Ryzen, especially in games. With two M.2 slots – one Hyper M.2 (PCIe Gen4 x4) and one M.2 (PCIe Gen3 x2 & SATA3) – you can easily combine a fast NVMe for the operating system and a second SSD for games/work. The six SATA3 6.0 Gb/s ports plus support for RAID 0, 1, 10 allow for quite flexible storage configurations – from a simple gaming build to a small home file server. The built-in Gigabit LAN (Realtek RTL8111H) is complemented by features like Wake-On-LAN, energy-efficient Ethernet, and ESD protection.
- CPU socket AM4 supporting Ryzen 3000, 4000 G-Series, and 5000 gives you a wide choice of processors – from budget to quite powerful.
- 4 slots for DDR4 memory, dual-channel mode, and capacity up to 128 GB allow for easy upgrades from 16/32 GB to more serious configurations for years to come.
- Support for high RAM frequencies up to 4733+ MHz (OC), which is important for Ryzen systems where fast memory significantly affects FPS and responsiveness.
- Two M.2 slots – 1 x Hyper M.2 (PCIe Gen4 x4) and 1 x M.2 (PCIe Gen3 x2 & SATA3) – allow for a combination of very fast system NVMe and a second SSD or SATA M.2.
- 6 x SATA3 6.0 Gb/s with RAID 0, 1, 10 are a good resource for many games, media libraries, or mirrored arrays for more secure data.
- Expansion slots 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x1 and M.2 Key E for WiFi allow you to install a powerful GPU, additional cards, and an option for wireless networking.
- Rich rear I/O with HDMI, DisplayPort 1.4, and D-Sub, USB 3.2 Gen2 Type-A and Type-C, many USB 3.2 Gen1 and USB 2.0, plus audio jacks and RJ-45 covers typical needs for gaming and office.
- Built-in audio with Realtek ALC1200 Audio Codec provides decent quality for gaming, movies, and voice chat without the need for a separate sound card.
- AMD Quad-GPU CrossFireX support if you want to experiment with more than one AMD graphics card.
- Gigabit LAN (Realtek RTL8111H) with Wake-On-LAN, ESD protection, and Energy Efficient Ethernet 802.3az for a stable and secure wired network.
Who it is suitable for: if you are making a compact gaming or all-round build on AM4 and want PCIe 4.0, two M.2 slots, and sufficient RAM capacity, the B550M PRO4 is a very reasonable foundation. It is also suitable for work (programming, light video, office), as well as for a home NAS/media server with several drives. If you need extras like built-in WiFi out of the box or very noticeable RGB and premium overclocking, you should look at a higher class.
The most sensible aspect here is the combination of B550, PCIe 4.0 x16, two M.2 slots, and up to 128 GB DDR4 in micro ATX format – a powerful and flexible platform for AM4, without paying for unnecessary extras.
Full specifications
- Manufacturer
-
Asrock
- CPU socket
-
AM4
- Chipset (MB)
- AMD B550
- Form factor
- Micro ATX
- Supported processors
-
AMD AM4 Ryzen; Supports AMD AM4 Socket Ryzen™ 3000, 4000 G-Series and 5000
- Supported memory
-
DDR4
- Number of memory slots
- 4
- Maximum RAM capacity
- 128 GB
- Memory frequency (MHz)
-
up to 4733+ (OC)
- Support for dual-channel memory
- Yes
- Built-in LAN
-
- PCIE x1 Gigabit LAN 10/100/1000 Mb/s- Realtek RTL8111H- Supports Wake-On-LAN- Supports Lightning/ESD Protection- Supports Energy Efficient Ethernet 802.3az- Supports PXE
- SATA interface
- 6 x SATA3 6.0 Gb/s
- RAID support
- 0,1,10
- M2 slot
-
1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 PCI Express module up to Gen4x4 (64 Gb/s), 1 x M.2 Socket (M2_2), supports M Key type 2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s), 6 x SATA3 6.0 Gb/s Connector1 x Hyper M.2(PCIe Gen4 x4)1 x M.2(PCIe Gen3 x2 & SATA3)
- Expansion slots
-
1 x PCIe 4.0 x161 x PCIe 3.0 x161 x PCIe 3.0 x11 x M.2 Key E for WiFi; 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4 mode), 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4 mode), 1 x PCI Express 3.0 x1 Slot, Supports AMD Quad CrossFireX and CrossFireX, 1 x M.2 Socket (Key E).
- Power connector
-
1 x COM Port Header, 1 x SPI TPM Header, 1 x Power LED and Speaker Header, 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control), 1 x 24 pin ATX Power Connector, 1 x 8 pin 12V Power Connector, 1 x Front Panel Audio Connector.1 x 24 pin1 x 4 pin
- USB ports
-
2 x USB 3.2 Gen2 (Rear Type A+C)8 x USB 3.2 Gen1 (4 Front, 4 Rear)
- Multi GPU technology
- AMD Quad-GPU CrossFireX Technology
- BIOS
- 256Mb AMI UEFI Legal BIOS with GUI support, Supports "Plug and Play", ACPI 5.1 compliance wake up events, Supports jumperfree, SMBIOS 2.3 support, CPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustment.;
- Processor generation
-
5th generation4th generation3rd generation
- Warranty
- 36 months
- Supported technologies
- ASRock Motherboard Utility (A-Tuning), ASRock XFast LAN
- OS
-
Microsoft Windows 10 64-bitMicrosoft Windows 10 64-bit
- Built-in audio
-
7.1 CH HD Audio with Content Protection (Realtek ALC1200 Audio Codec)Premium Blu-ray Audio supportSupports Surge ProtectionPCB Isolate ShieldingIndividual PCB Layers for R/L Audio ChannelNahimic Audio.Realtek ALC1200 Audio Codec
- Rear I/O panel
-
Antenna Bracket1 x PS/2 Mouse/Keyboard Port1 x D-Sub Port1 x HDMI Port1 x DisplayPort 1.41 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)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 / MicrophoneAntenna Bracket, 1 x PS/2 Mouse/Keyboard Port, 1 x D-Sub Port, 1 x HDMI Port, 1 x DisplayPort 1.4, 1 x USB 3.2 Gen2 Type-A Port, 1 x USB 3.2 Gen2 Type-C Port, 4 x USB 3.2 Gen1 Ports, 2 x USB 2.0 Ports, 1 x RJ-45 LAN Port with LED.
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