Zephyra MB-6646 Ultra B550 ATX Wi-Fi 6E Motherboard
Motherboards · Zephyra · SKU MB6646-ULTRA · Released 2021 · Updated 2026-10-21
Key facts
| Benchmark index | 3,950 (Motherboards scale) |
|---|---|
| Category rank | #37,093 |
| Street price | $299 |
| Power | 36 W |
| Performance per dollar | 13.21 |
| Released | 2021 |
Specifications
| Brand | Zephyra |
|---|---|
| Model | Zephyra MB-6646 Ultra |
| Socket | AM4 |
| Chipset | B550 |
| Form factor | ATX |
| Memory | 4× DDR4 DIMM, up to 128 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 6E (802.11ax, 6 GHz) + Bluetooth 5.3 |
| Overclocking | CPU + memory |
| VRM | 17+2+1 phases, 80 A stages |
| BIOS | Dual UEFI, BIOS flashback button |
Related guides
PCIe Lanes ExplainedM.2 SSD Sizes and KeysWi-Fi 6E ExplainedAMD AM5 Chipsets ComparedIntel 800 Series ChipsetsAMD AM5 Socket
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Cite this page: Hardware Spec Index, “Zephyra MB-6646 Ultra B550 ATX Wi-Fi 6E Motherboard”, https://vextor7.com/item/432256 (accessed 2026-10-21).