Zephyra MB-4991 Plus B550 Mini-ITX Wi-Fi 6 Motherboard
Motherboards · Zephyra · SKU MB4991-PLUS · Released 2020 · Updated 2026-10-25
Key facts
| Benchmark index | 3,034 (Motherboards scale) |
|---|---|
| Category rank | #29,742 |
| Street price | $179 |
| Power | 30 W |
| Performance per dollar | 16.95 |
| Released | 2020 |
Specifications
| Brand | Zephyra |
|---|---|
| Model | Zephyra MB-4991 Plus |
| Socket | AM4 |
| Chipset | B550 |
| Form factor | Mini-ITX |
| Memory | 2× DDR4 DIMM, up to 64 GB |
| Max memory speed | DDR4-4800+ (OC) |
| Primary x16 slot | PCIe 4.0 x16 |
| M.2 slots | 2 total |
| Rear USB-C | 1× USB 3.2 Gen 2 10Gbps (Type-C) |
| Ethernet | 2.5GbE |
| Wireless | Wi-Fi 6 (802.11ax) + Bluetooth 5.2 |
| Overclocking | CPU + memory |
| VRM | 15+1+1 phases, 80 A stages |
| BIOS | Dual UEFI, BIOS flashback button |
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Cite this page: Hardware Spec Index, “Zephyra MB-4991 Plus B550 Mini-ITX Wi-Fi 6 Motherboard”, https://vextor7.com/item/76521202 (accessed 2026-10-25).