Novexa MB-3991 Prime B650E ATX Wi-Fi 6E Motherboard
Motherboards · Novexa · SKU MB3991-PRIME · Released 2022 · Updated 2026-10-23
Key facts
| Benchmark index | 5,559 (Motherboards scale) |
|---|---|
| Category rank | #11,212 |
| Street price | $619 |
| Power | 51 W |
| Performance per dollar | 8.98 |
| Released | 2022 |
Specifications
| Brand | Novexa |
|---|---|
| Model | Novexa MB-3991 Prime |
| Socket | AM5 |
| Chipset | B650E |
| Form factor | ATX |
| Memory | 4× DDR5 DIMM, up to 192 GB |
| Max memory speed | DDR5-6400+ (OC) |
| Primary x16 slot | PCIe 5.0 x16 |
| M.2 slots | 3 total, 1× PCIe 5.0 x4 |
| Rear USB-C | 1× USB 3.2 Gen 2x2 20Gbps (Type-C) |
| Ethernet | 10GbE + 2.5GbE |
| Wireless | Wi-Fi 6E (802.11ax, 6 GHz) + Bluetooth 5.3 |
| Overclocking | CPU + memory |
| VRM | 23+2+2 phases, 110 A stages |
| BIOS | Dual UEFI, BIOS flashback button |
Related guides
PCIe Lanes ExplainedM.2 SSD Sizes and KeysAMD AM5 SocketAMD AM5 Chipsets ComparedDDR5 Memory ExplainedPCIe 5.0 Explained
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Cite this page: Hardware Spec Index, “Novexa MB-3991 Prime B650E ATX Wi-Fi 6E Motherboard”, https://vextor7.com/item/8685307 (accessed 2026-10-23).