BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU
AMD B550
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
LEARN MORE ABOUT THE ASROCK B550 PRO4
Brand | ASRock |
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Model | B550 PRO4 |
CPU Socket Type | AM4 |
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CPU Type | Supports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors* * Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G. * BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASRock website for CPU support list. |
Chipset | AMD B550 |
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Number of Memory Slots | 4×288pin |
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Memory Standard | 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* * For Ryzen Series CPUs (Picasso), ECC is only supported with PRO CPUs. |
Maximum Memory Supported | 128GB ** Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation. |
Channel Supported | Dual Channel |
PCI Express 4.0 x16 | AMD Ryzen series CPUs (Matisse) - 1 x PCI Express x16 Slots (PCIE1: Gen4x16 mode)* AMD Ryzen series APUs (Renoir) - 1 x PCI Express x16 Slots (PCIE1: Gen3x16 mode)* * Supports NVMe SSD as boot disks |
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PCI Express 3.0 x16 | AMD Ryzen series CPUs (Matisse) - 1 x PCI Express x16 Slots (PCIE3: Gen3 x4 mode)* AMD Ryzen series APUs (Renoir) - 1 x PCI Express x16 Slots (PCIE3: Gen3 x4 mode)* * Supports NVMe SSD as boot disks |
PCI Express x1 | 2 x PCI Express 3.0 x1 Slots |
Other Slots | 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module |
SATA 6Gb/s | 6 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug* * M2_3 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be disabled. |
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M.2 | 1 x Hyper M.2 Socket (M2_1), supports M Key type 2260/2280/22110 M.2 PCI Express module up to Gen4x4 (64Gb/s) (with Matisse) or Gen3x4 (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 RAID | 0/1/10 |
Onboard Video Chipset | Integrated AMD Radeon Vega Series Graphics in Ryzen Series APU* DirectX 12, Pixel Shader 5.0 Shared memory default 2GB. Max Shared memory supports up to 16GB.** Dual graphics output: support HDMI and D-Sub ports by independent display controllers Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz Supports D-Sub with max. resolution up to 1920x1200 @ 60Hz Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.1 Port (Compliant HDMI monitor is required) Supports HDR (High Dynamic Range) with HDMI 2.1 Supports HDCP 2.3 with HDMI 2.1 Port Supports 4K Ultra HD (UHD) playback with HDMI 2.1 Port Supports Microsoft PlayReady * Actual support may vary by CPU. ** The Max shared memory 16GB requires 32GB system memory installed. |
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Audio Chipset | Realtek ALC1200 |
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Audio Channels | 7.1 Channels |
LAN Chipset | Realtek RTL8111H |
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Max LAN Speed | 10/100/1000Mbps |
Back I/O Ports | Antenna 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 |
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Onboard USB | 2 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) |
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Other Connectors | 1 x COM Port Header 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)*** 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control) 4 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. *** The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power. **** The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power. **** CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP and CHA_FAN4/WP can auto detect if 3-pin or 4-pin fan is in use. |
Form Factor | ATX |
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LED Lighting | RGB |
Dimensions (W x L) | 12.0" x 9.6" |
Power Pin | 1 x 24-pin ATX Power Connector 1 x 8-pin 12V Power Connector 1 x 4-pin 12V Power Connector |
Features | Unique Feature: ASRock USB 3.2 Gen2 - ASRock USB 3.2 Gen2 Type-A Port (10Gb/s) - ASRock USB 3.2 Gen2 Type-C Port (10Gb/s) ASRock Super Alloy - XXL Aluminum Alloy Heatsink - Premium 50A Power Choke - Sapphire Black PCB - High Density Glass Fabric PCB - 2oz Copper PCB ASRock Steel Slot Gen4 ASRock Full Coverage M.2 Heatsink ASRock Hyper M.2 (PCIe Gen4x4) ASRock POST Status Checker (PSC) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update & APP Shop 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 Software and UEFI: Software - ASRock Motherboard Utility (A-Tuning) - ASRock Polychrome SYNC - ASRock XFast LAN UEFI - ASRock Full HD UEFI - ASRock Instant Flash * These utilities can be downloaded from ASRock Live Update & APP Shop. Support CD: - Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar Hardware Monitor: - Temperature Sensing: CPU, CPU/Water Pump, Chassis/Water Pump Fans - Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water Pump Fans - Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU/Water Pump, Chassis/Water Pump Fans - Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/Water Pump Fans - Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDP OS: - Microsoft Windows 10 64-bit Certifications: - FCC, CE - ErP/EuP ready (ErP/EuP ready power supply is required) |
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Date First Available | June 12, 2020 |
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Payment & Security

Refund Policy
We have a 3-day return policy, which means you have 3 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at we@ayota.com.bd. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at we@ayota.com.bd.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods, custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.