Motherboard // MSI
MSI PRO B840M-B Motherboard
Technical specification
AMD B840 mATX Motherboard for AM5 — No Wi-Fi, 2.5G LAN, USB 5Gbps Front Type-C, Dual PCIe 4.0 M.2, DDR5 8000+ OC, 2x DDR5 Slots, HDMI 2.1 + VGA, Direct 7+2+1 P-PAK Power System, Ryzen 9000 / 8000 / 7000 Ready.
The MSI PRO B840M-B is the entry-level wired-only mATX option in the B840 PRO range — slim at 226 x 243mm and priced for maximum affordability without compromising on core features. It features a Direct 7+2+1 P-PAK Power System on a 6-layer 2oz copper PCB, Realtek 2.5G LAN, dual PCIe 4.0 x4 CPU M.2, front USB 5Gbps Type-C, HDMI 2.1 + VGA dual video output, EZ M.2 Clip II, EZ PCIe Clip II, and Flash BIOS Button — ideal for no-frills Ryzen 9000 or Ryzen 8000 budget builds in a clean black design.
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>CPU Support: AMD Ryzen 9000 / 8000 / 7000 Series, Socket AM5
>Power Delivery: Direct 7+2+1 P-PAK Power System, 1x 8-pin CPU connector, Core Boost, Memory Boost, 6-layer 2oz copper PCB
>Storage: 2x M.2 — M.2_1: PCIe 4.0 x4 (CPU, 2280/2260); M.2_2: PCIe 4.0 x4 (CPU, 2280/2260; PCIe 4.0 x2 Ryzen 8500/8300); 4x SATA 6G | RAID 0, 1, 10
>Connectivity: No Wi-Fi; Realtek 8125D 2.5G LAN
>USB: Rear — 2x USB 2.0, 4x USB 5Gbps Type-A; Front — 4x USB 2.0, 2x USB 5Gbps Type-A, 1x USB 5Gbps Type-C
>PCIe: PCI_E1: PCIe 4.0 x16 (CPU, x8 Ryzen 8700/8600/8400, x4 Ryzen 8500/8300); PCI_E2: PCIe 3.0 x4 (Chipset)
>Audio: Realtek ALC897, 7.1-CH, up to 192kHz
| Specification | Details |
|---|---|
| Chipset | AMD B840 |
| Socket | AM5 |
| Form Factor | mATX (226 x 243.84 mm), 6-layer 2oz copper PCB |
| Memory | 2x DDR5 UDIMM, up to 128GB; DDR5 8000–5600 (OC) / 5600–4800 (JEDEC) MT/s; 1DPC 1R max 8000+ MT/s / 1DPC 2R max 7200+ MT/s OC; Single-sided latches |
| Memory Standard | AMD EXPO, A-XMP, CUDIMM (bypass mode), Dual Channel, Non-ECC Unbuffered, High-Efficiency Mode, Latency Killer |
| PCIe Slots | PCI_E1: PCIe 4.0 x16 (CPU); PCI_E2: PCIe 3.0 x4 (Chipset) |
| M.2 Slots | M.2_1: PCIe 4.0 x4 (CPU, 2280/2260); M.2_2: PCIe 4.0 x4 (CPU, 2280/2260); No PCIe 5.0 M.2 (B840 chipset) |
| SATA | 4x SATA 6G | RAID 0, 1, 10; M.2 NVMe RAID 0, 1 |
| LAN | Realtek 8125D 2.5G LAN (no Wi-Fi) |
| Wireless | None |
| Rear USB | 2x USB 2.0, 4x USB 5Gbps Type-A |
| Front USB Headers | 4x USB 2.0, 2x USB 5Gbps Type-A, 1x USB 5Gbps Type-C |
| Video Output | 1x HDMI 2.1 (4K@60Hz) + 1x VGA (2048x1536 50Hz / 1920x1200 60Hz) — iGPU only |
| Audio | Realtek ALC897, 7.1-CH, up to 192kHz |
| Fan Headers | 1x CPU Fan, 2x System Fan, Smart Fan 6 |
| RGB | 3x ARGB V2 headers, 1x RGB header, 4x EZ Debug LED, 1x EZ Memory Detection LED |
| Extras | EZ M.2 Clip II, EZ PCIe Clip II, Flash BIOS Button, Clear CMOS Button, Click BIOS 5, Tuning Controller (JCOM), AI LAN Manager, metal backplate, High-Efficiency Mode, Latency Killer |
| OS Support | Windows 11 64-bit |
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Before you buy
Is this genuine, warranted stock?+
Yes — authorised MSI stock with full brand warranty, GST invoice, and serial tracking.
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Dispatched in 5–7 days with tracked shipping across India. Tracking is shared by email and SMS.
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