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Green circuit board with gold M.2 edge connector and attached RJ45 daughter board, low-profile bracket included

Syba

Syba SI-PEX24054 M.2 B & M-Key Gigabit Ethernet expansion card

SKU CH-WV3T-258PZ MPN SI-PEX24054

Adds a Gigabit Ethernet port via an M.2 B & M-key slot, includes low-profile bracket and internal cable

  • External connectorsGigabit Ethernet Port
  • Internal portsM.2 (B & M-Key) PCI-e
  • Product typeM.2 (B & M-Key) PCI-e to Gigabit Ethernet
  • Compatible withPC Motherboard with B & M key M.2 Slot
  • DetailsThe M.2 Gigabit Ethernet NIC allows the expansion card to be
  • Key featuresFully compliant with Microsoft® NDIS5, NDIS6(IPv4, IPv6, TCP
  • Adds wired Gigabit Ethernet via an M.2 B & M-key slot
  • Fits compact systems with a 5.50" x 3.80" x 1.55" low-profile card
  • Offloads checksum and segmentation tasks to reduce CPU load
  • Supports IEEE 802.1Q VLAN tagging for network segmentation
  • Includes RJ45 daughter board, bracket, cable and driver CD

M.2 B-Key and M-Key Gigabit Ethernet card

This Syba SI-PEX24054 add-on card converts a motherboard M.2 slot that supports both B-key and M-key pin-outs into a single Gigabit Ethernet port using a PCIe interface. It is designed for compact systems where an internal network module is preferred over a standard expansion slot.

Builders with a compatible M.2 slot needing wired

The card suits integrators who have a free B- and M-key M.2 slot wired for PCIe and want to add a secure RJ45 connection without occupying a full-size slot. Systems that lack this specific M.2 key arrangement or that route the slot only for non-PCIe signals cannot use the adapter.

B- and M-key M.2 slot with PCIe signalling

Compatibility depends entirely on the motherboard providing an M.2 connector that accepts both B-key and M-key modules and carries PCIe lanes to that connector. Without that slot type and signalling the card will not function.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 85% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameSYBA
Model nameSI-PEX24054
Product typeM.2 (B & M-Key) PCI-e to Gigabit Ethernet
Ports & slots
External connectorsGigabit Ethernet Port
Internal portsM.2 (B & M-Key) PCI-e
Size & build
Product dimensions5.5 in × 3.8 in × 1.55 in
Product weight0.4 lb (0.18 kg)
Shipping weight0.12 kg
Package size152 × 99 × 43 mm
Compatibility
Compatible withPC Motherboard with B & M key M.2 Slot
In the box
In the box1 x M.2 Gigabit LAN Module
1 x RJ45 Daughter PCI Board
1 x Low Profitl Bracket
1 x Internal Data Cable
1 x Manual
1 x Driver CD

Questions about this item

Will the RJ45 daughter board or internal data cable need replacing after long use?

The RJ45 daughter board and internal data cable are included in the package and have no stated replacement interval; they are solid-state parts with no moving components.

What limits throughput when the card runs at full gigabit speed continuously?

The single Gigabit Ethernet port caps sustained throughput at 1 Gbps, and the PCIe link width of the M.2 slot determines the actual ceiling.

How much heat or noise does the module add inside a small chassis?

The passively cooled M.2 module draws minimal power, adds no fan noise, and its 5.50" x 3.80" x 1.55" board fits low-profile builds without raising chassis temperature noticeably.

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