ASRock B550 Pro4 AM4 ATX Motherboard - DDR4, Dual M.2
ASRock
ASRock B550 Pro4 AM4 ATX Motherboard - DDR4, Dual M.2
The ASRock B550 Pro4 is an AMD AM4 ATX motherboard designed for Ryzen 5000, 5000 G-Series, and earlier-generation processors, with a focus on stable power delivery and PCIe 4.0 connectivity. It combines an 8-phase power design with dual M.2 slots and comprehensive USB 3.2 support, making it suitable for gaming, content creation, and productivity builds on a mid-range budget.
Why this product
Ryzen 5000 and 3000 series ready
Full support for AMD Ryzen 5000, 5000 G-Series, and earlier generations on a single socket with stable power delivery via 8 power phases and 50A chokes.
PCIe 4.0 and dual M.2 storage
One Hyper M.2 slot runs PCIe Gen4 x4 for fast NVMe drives, plus a second M.2 slot supporting Gen3 x2, SATA3, and larger 22110-form drives.
USB 3.2 Gen2 on rear I/O
Type-A and Type-C USB 3.2 Gen2 ports deliver up to 10 Gbps data transfer rates for high-speed external storage and peripherals.
128 GB DDR4 capacity with high overclocking support
Four memory slots support up to 128 GB of DDR4 with rated speeds reaching DDR4 4733+ on APUs, enabling both large workloads and performance tuning.
RGB and audio for immersion
Polychrome SYNC RGB control, Nahimic audio with Sound Tracker, and 7.1-channel HD audio via Realtek ALC1200 codec.
- Form FactorATX
- CPU SocketAMD AM4
- ChipsetAMD B550
- Memory Support4 x DDR4 DIMM, up to 128 GB
- M.2 Slots2 (Hyper PCIe Gen4 x4, Gen3 x2 / SATA)
- PCIe Expansion1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x1
- USB 3.2 Gen2Type-A + Type-C (Rear)
- SATA Ports6
- SKUASR-1913
- EAN4710483931482
- Supports all AMD Ryzen 3000, 3000 G-Series, 4000 G-Series, 5000, and 5000 G-Series desktop processors on AM4 socket.
- Accepts standard DDR4 DIMM memory modules, ECC and non-ECC, unbuffered, up to 128 GB total.
- Fits standard ATX case form factor with rear I/O shield included.
- Hyper M.2 slot supports 22110 form factor, but the second M.2 slot is limited to 2242/2260/2280 sizes.
- Does not support Intel or Threadripper processors; AM4 socket only.
Best for
- Ryzen 5000 builds on a reasonable budget
- Gaming and streaming with PCIe 4.0 NVMe storage
- Content creators needing 128 GB RAM capacity
- Users wanting dual M.2 slots for OS and game library separation
- RGB-lit builds with synchronisation across compatible accessories
Trade-offs
- Intel platform builders: This motherboard supports only AMD AM4 processors and will not work with Intel or Threadripper CPUs.
- Enterprise or server workloads: No integrated lights-out or IPMI; designed for consumer desktop use only.
- Builders needing more than 1 PCIe 4.0 x16 slot: Only one PCIe 4.0 x16 slot is present; the second x16 slot runs at PCIe 3.0.
- Users requiring Wi-Fi: This motherboard has no onboard Wi-Fi; only wired Gigabit Ethernet via Realtek.
Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors
Whether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details. The Sound Tracker is a visual indicator that points out the directions from which predominant sounds are coming. Each sound is properly positioned in 360° on a radar for a full immersion during the game.
Featuring sturdy components and completely smooth power delivery to the CPU.
Compared to traditional chokes, ASRock's premium 50A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard. 2 ounce copper inner layers that provide stable signal traces and power shapes! Delivering lower temperature and higher energy efficiency for overclocking, it's able to support the latest DDR4 memory modules with most extreme memory performance!
Dual M.2 For SSD, Supports Type 22110 M.2 Ready for higher capacity and even faster Type 22110 M.2 NVMe SSD to fulfill the need of performance. Hyper M.2 socket that supports PCIe Gen4 x4 while M.2 socket is capable of running PCIe Gen3 x2 and SATA3 mode.
This motherboard has a pair of onboard Type-A and Type-C USB 3.2 Gen2 ports built on the rear i/o for supporting next generation USB 3.2 Gen2 devices and to deliver up to 10 Gbps data transfer rates.
ASRock motherboards deliver stunning performance and superior aesthetics to rule your own colorful lighting way! ASRock offers a very comprehensive control to perform the built-in RGB LEDs or the connected LED strips, CPU fans, coolers, chassis and any RGB devices smoothly. Devices can be synchronized across the Polychrome RGB Sync-certified accessories as well.
*The addressable RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V), a max of 80 LEDs and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.
General
| Brand | ASRock |
|---|---|
| Model | B550 Pro4 |
| Form Factor | ATX |
CPU & Memory
| CPU Socket | AMD AM4 |
|---|---|
| Supported Processors | AMD Ryzen 3000, 3000 G-Series, 4000 G-Series, 5000, and 5000 G-Series Desktop Processors |
| Chipset | AMD B550 |
| Memory Slots | 4 x DDR4 DIMM |
| Max Memory Capacity | 128 GB |
| Memory Speed (Ryzen CPUs) | DDR4 2133–4533+ (OC), ECC & non-ECC |
| Memory Speed (Ryzen APUs) | DDR4 2133–4733+ (OC), ECC & non-ECC |
Storage & Expansion
| M.2 Sockets | 2 (Hyper M.2 PCIe Gen4 x4 supports 2260/2280/22110; M.2 PCIe Gen3 x2 & SATA3 supports 2242/2260/2280) |
|---|---|
| SATA Ports | 6 x SATA3 |
| PCIe Expansion Slots | 1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x1 |
Connectivity & Audio
| USB (Rear) | 2 x USB 3.2 Gen2 (Type-A + Type-C), 4 x USB 3.2 Gen1 |
|---|---|
| USB (Front Header) | 4 x USB 3.2 Gen1 |
| LAN | Realtek Gigabit (RTL8111H) |
| Audio | 7.1 CH HD Audio (Realtek ALC1200), Nahimic Audio with Sound Tracker |
| Graphics Output | 1 x D-Sub, 1 x HDMI |
Power & Thermal
| Power Design | 8 Power Phase Design with Digi Power, 50A Power Chokes |
|---|---|
| PCB | 2oz Copper inner layers, Solid Capacitor design |
RGB & Extras
| RGB Control | ASRock Polychrome SYNC with 1 x Addressable RGB header (5V) and 1 x RGB LED header (12V) |
|---|---|
| Box Contents | B550 Pro4 motherboard, Support CD, 2 x SATA cables, 3 x M.2 screws, 1 x M.2 standoff, 1 x I/O Panel Shield |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.