ASUS TUF Gaming B550-Plus WiFi II Socket AM4 DDR4 ATX Motherboard
6799 EGP
- Socket / chipset: AMD AM4 / B550
- Form factor: ATX
- Memory: DDR4
- Expansion: PCIe 4.0 x16 primary slot with supported processors
- Storage: 2 M.2 slots as listed
- Wireless: Wi-Fi 6 and Bluetooth 5.1
- Warranty: 3 Years
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ASUS TUF Gaming B550-Plus WiFi II Socket AM4 DDR4 ATX Motherboard
ASUS TUF Gaming B550-Plus WiFi II is an ATX motherboard built on the AMD B550 chipset with an AM4 socket. It supports AMD Ryzen 5000, 5000 G-Series, 4000 G-Series, and 3000 Series processors, has four DDR4 DIMM slots with up to 128GB capacity, and offers PCIe 4.0 x16 for Ryzen 5000/3000 chips. Check the current price and availability shown on this product page.
⚡ Engineering Highlights at a Glance:
- AMD AM4 Socket: Works with Ryzen 5000 Series, 5000 G-Series, 4000 G-Series, and 3000 Series desktop processors [citation:1][citation:4].
- 8+2 DrMOS Power Stages: Combines high- and low-side MOSFETs and driver into a single package for stable power delivery to Ryzen CPUs [citation:1][citation:2].
- 4 x DDR4 DIMM Slots: Supports up to 128GB dual-channel memory with speeds up to 4866 MHz (OC) [citation:4][citation:12].
- PCIe 4.0 x16 and Dual M.2: Main slot runs PCIe 4.0 on Ryzen 5000/3000; M.2_1 supports PCIe 4.0 x4, M.2_2 supports PCIe 3.0 x4 [citation:1][citation:4].
- Wi-Fi 6 and 2.5Gb Ethernet: Built-in Wi-Fi 6 (802.11ax) with Bluetooth 5.2, plus Realtek 2.5Gb Ethernet with TUF LANGuard [citation:7][citation:10].
- USB 3.2 Gen 2 Type-C: Rear panel includes one Type-A and one Type-C USB 3.2 Gen 2 port, plus Thunderbolt 3 header support [citation:1][citation:7].
- TUF Protection and BIOS FlashBack: SafeSlot, ESD Guards, TUF LANGuard, and BIOS FlashBack button for updates without a CPU installed [citation:6].
Who is the TUF Gaming B550-Plus WiFi II For?
Expert Advice & Build Considerations
CPU Compatibility and PCIe Generation
The B550 chipset supports AMD Ryzen 5000, 5000 G-Series, 4000 G-Series, and 3000 Series processors on the AM4 socket; Ryzen 1000 and 2000 Series are not compatible [citation:1]. PCIe 4.0 x16 on the main slot and PCIe 4.0 x4 on the M.2_1 slot only work with Ryzen 5000/3000 (non-G) processors. With Ryzen 5000 G-Series or 4000 G-Series APUs, the main PCIe slot and M.2_1 run at PCIe 3.0 speeds instead [citation:4]. Verify your CPU choice against the ASUS CPU support list before purchase.
Memory and M.2 Population
Install memory in slots A2 and B2 first for dual-channel operation. The board supports up to 128GB across four DIMM slots, with speeds up to 4866 MHz (OC) [citation:4]. The M.2_1 slot (PCIe 4.0 x4) sits near the CPU; the M.2_2 slot (PCIe 3.0 x4) sits lower. Note that the M.2_2 slot shares bandwidth with SATA ports 5 and 6; when you populate M.2_2, those two SATA ports become unavailable [citation:4][citation:12]. Check the manual before populating all storage at once.
Power, Networking, and BIOS
The board uses a 24-pin EATX main connector plus an 8-pin ProCool ATX 12V CPU connector [citation:1]. Connect the 8-pin CPU power cable for stable delivery on high-core Ryzen chips. The rear I/O provides two USB 3.2 Gen 2 ports (one Type-A and one Type-C), four USB 3.2 Gen 1, and two USB 2.0 [citation:12]. Internal headers add two USB 3.2 Gen 1 and four USB 2.0 ports, plus a Thunderbolt 3 header [citation:1]. The board includes Wi-Fi 6 and Bluetooth 5.2; note that Bluetooth 5.2 requires Windows 11 or later [citation:9]. BIOS FlashBack on the rear I/O lets you update the BIOS without a CPU installed, which helps if the board ships with a BIOS older than your Ryzen 5000 chip [citation:6].
Technical Specifications
| Model Name | TUF GAMING B550-PLUS WIFI II |
| Brand | ASUS |
| SKU / MPN | 90MB19U0-M0EAY0 |
| EAN / UPC | 195553338417 |
| Socket | AMD AM4 |
| Chipset | AMD B550 |
| Form Factor | ATX (30.5 x 24.4 cm) |
| CPU Support | AMD Ryzen 5000 / 5000 G-Series / 4000 G-Series / 3000 Series |
| Memory | 4 x DDR4 DIMM, Max 128GB, Dual Channel, up to 4866 MHz (OC) |
| Graphics Outputs | 1 x HDMI 2.1 (4K@60Hz) | 1 x DisplayPort 1.2 |
| Expansion Slots | 1 x PCIe 4.0 x16 (Ryzen 5000/3000) | 1 x PCIe 3.0 x16 (x4 mode) | 3 x PCIe 3.0 x1 |
| Storage | 1 x M.2 (PCIe 4.0 x4, 2242-22110) | 1 x M.2 (PCIe 3.0 x4, 2242-22110) | 6 x SATA 6Gb/s | RAID 0, 1, 10 |
| Ethernet | Realtek 2.5Gb Ethernet with TUF LANGuard |
| Wireless | Wi-Fi 6 (2×2, 802.11ax, 2.4/5GHz) | Bluetooth 5.2 (Windows 11 required) |
| USB Ports (Rear) | 2 x USB 3.2 Gen 2 (1 x Type-A, 1 x Type-C) | 4 x USB 3.2 Gen 1 Type-A | 2 x USB 2.0 |
| USB Headers (Internal) | 1 x USB 3.2 Gen 1 (2 ports) | 2 x USB 2.0 (4 ports) |
| Audio | Realtek 7.1 Surround Sound CODEC, up to 24-Bit/192 kHz, optical S/PDIF out |
| RGB Headers | 2 x Aura RGB | 2 x Addressable Gen 2 |
| Fan Headers | 1 x CPU Fan | 1 x CPU OPT | 3 x Chassis Fan | 1 x AIO_PUMP |
| Special Features | BIOS FlashBack | SafeSlot | ESD Guards | TUF LANGuard | ProCool | Stack Cool 3+ | Digi+ VRM | M.2 Heatsink | Thunderbolt 3 header |
| Warranty | 3 Years Local Alfrensia Warranty |
Expert Recommendation: Building with the TUF Gaming B550-Plus WiFi II
Pair this board with a Ryzen 5 5600, Ryzen 7 5700X, or Ryzen 7 5800X3D for the best balance of PCIe 4.0 support and gaming performance. Because PCIe 4.0 only works on Ryzen 5000/3000 (non-G) chips, choose a non-APU processor if you plan to use a PCIe 4.0 NVMe SSD.
Install memory in slots A2 and B2 first for dual-channel operation. For a 3600 MHz kit, enable DOCP in the BIOS to run the rated speed; without DOCP, memory defaults to 2133 MHz. Because M.2_2 and SATA ports 5 and 6 share bandwidth, plan your storage layout before you install drives.
Before you install the CPU, check the BIOS revision. If the board ships with a BIOS older than your Ryzen 5000 chip, use the BIOS FlashBack button on the rear I/O to update without a CPU installed. Also, connect the 8-pin ProCool CPU power cable for stable power delivery on high-core Ryzen chips.
Use the AIO_PUMP header for liquid cooler pumps, and the CPU_FAN and CPU_OPT headers for a dual-fan tower cooler or AIO radiator fans. Enable Aura Sync in Armoury Crate to sync the two RGB headers and two addressable Gen 2 headers with your other ASUS peripherals. Because the board has Wi-Fi 6 and Bluetooth 5.2 built in, you do not need a separate wireless card; just attach the included Wi-Fi antenna for the best signal.
Frequently Asked Questions
Which AMD processors are compatible with the TUF Gaming B550-Plus WiFi II?
It supports AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series, and 3000 Series desktop processors on the AM4 socket. Older Ryzen 1000 and 2000 Series processors are not compatible with the B550 chipset. Verify your specific CPU against the ASUS CPU support list before purchase.
Does the board support PCIe 4.0 on both M.2 slots?
No. Only the M.2_1 slot runs PCIe 4.0 x4, and only when paired with a Ryzen 5000 or 3000 Series (non-G) processor. The M.2_2 slot runs PCIe 3.0 x4 on all supported CPUs. With Ryzen 5000 G-Series or 4000 G-Series APUs, both M.2 slots run at PCIe 3.0 speeds.
Can I update the BIOS without a CPU installed?
Yes. The BIOS FlashBack button on the rear I/O lets you update the BIOS using a USB drive without a CPU or memory installed. This is useful when the board ships with a BIOS version older than your processor’s release, particularly for certain Ryzen 5000 Series chips.
How many M.2 and SATA drives can I use at once?
The board has two M.2 slots and six SATA 6Gb/s ports. However, the M.2_2 slot shares bandwidth with SATA ports 5 and 6. Therefore, if you populate M.2_2, those two SATA ports become unavailable. Check the manual for the exact sharing rules before you install drives.
Does the board have built-in Wi-Fi and Bluetooth?
Yes. The TUF Gaming B550-Plus WiFi II includes Wi-Fi 6 (802.11ax) and Bluetooth 5.2. Note that Bluetooth 5.2 requires Windows 11 or later to function fully. The board also includes Realtek 2.5Gb Ethernet for wired connections. Attach the included Wi-Fi antenna for the best wireless signal.
| MODEL | |
|---|---|
| CHIPSET MANUFACTURERS | |
| CPU Socket | |
| Motherboard Chipset | |
| Motherboard Type | |
| CPU SERIES | |
| Technology | |
| Memory Speed | |
| Max Memory Size | |
| Memory Slot | |
| PCI-E X16 | |
| PCI-E GEN | PCIe 4.0, PCIe 3.0 |
| PCI-E Slots (M.2) | |
| SATAIII | |
| Communication module | |
| I/O Ports | DisplayPort 1.4, 1x HDMI, 1 x SPDIF Out, 1 x USB 3.2 Gen 2 Type-C, 2x USB 3.2 Gen 2 Type-A, 2.5Gb LAN, 4x USB 3.2 Gen 1 Type-A |
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) |
| Part Number | |
| Warranty |
| RAM TYPE |
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Warranty & Purchase Terms
- Warranty period: the manufacturer's warranty period, from one month up to 3 years.
- Immediate replacement: if a manufacturing defect appears at any time during the warranty, the product is replaced with a new one, no repair (except products that need software work). If no replacement is available, you get a full refund with no deductions.
- Returns: within 30 days of purchase, if the product is in the same condition with all its contents.
- Receiving your order: check the shipment on delivery; if anything is damaged or missing, contact us within 24 hours and keep the box and photos.
- Not covered: misuse (burning, breaking, scratching, removing the warranty sticker), operating systems, software and generic accessories.
- Important: keep the Alfrensia warranty sticker on the product and all box contents to benefit from the agent's warranty.
- Payment & delivery: cash on delivery. Cairo, Giza & Alexandria within 1–3 business days, other governorates within 3–6 business days after order confirmation.
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