Kyndral MB-4139 XT B550 ATX Wi-Fi 6 Motherboard
Motherboards · Kyndral · SKU MB4139-XT · Released 2020 · Updated 2026-10-24
Key facts
| Benchmark index | 3,019 (Motherboards scale) |
|---|---|
| Category rank | #1,860 |
| Street price | $159 |
| Power | 29 W |
| Performance per dollar | 18.99 |
| Released | 2020 |
Specifications
| Brand | Kyndral |
|---|---|
| Model | Kyndral MB-4139 XT |
| 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 | 3 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, 70 A stages |
| BIOS | UEFI |
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Cite this page: Hardware Spec Index, “Kyndral MB-4139 XT B550 ATX Wi-Fi 6 Motherboard”, https://vextor7.com/item/92431331 (accessed 2026-10-24).