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Green PCB card with four silver RJ45 ports and a silver heatsink

SMUGDESK

SMUGDESK Quad Port Gigabit PCIe x1 NIC Realtek RTL8111H 4×RJ45

SKU CH-YQDE-ZZPRT

Adds four independent gigabit RJ45 ports via a single PCIe x1 slot using Realtek RTL8111H chips, with passive cooling and low-profile bracket included

  • Four independent gigabit ports from one PCIe slot
  • Passive heatsink keeps the card stable under 24/7 load
  • Low-profile and full-height brackets fit ATX and SFF builds
  • Hardware checksum offload cuts CPU overhead during heavy traffic
  • Wake-on-LAN and VLAN support simplify remote management and segmentation

Four-port gigabit PCIe x1 card

This SMUGDESK adapter adds four independent RJ45 ports to a desktop or NAS through a single PCIe x1 slot. Each port auto-negotiates 10, 100 or 1000 Mbps and works with Cat5e or Cat6 cable up to 100 m. Full-height and low-profile brackets are included for ATX or slim SFF chassis.

PCIe x1 bus limits total throughput

The card uses a PCIe x1 connection, so aggregate bandwidth across all four ports cannot exceed the single-lane ceiling. Auto MDI/MDIX and 9 KB jumbo frames are supported, but simultaneous line-rate traffic on every port will saturate the bus. Hardware checksum offload and IEEE 802.3x flow control reduce CPU load within that constraint.

Realtek RTL8111H chipset determines compatibility

Four RTL8111H controllers provide the gigabit PHY and MAC functions. Driver support covers Windows OS and mainstream Linux distributions, enabling features such as IEEE 802.1Q VLAN tagging and Wake-on-LAN. Buyers needing a different controller family or more than four ports must choose another card.

Highlights

  • Four independent gigabit ports from one PCIe slot
  • Passive heatsink keeps the card stable under 24/7 load
  • Low-profile and full-height brackets fit ATX and SFF builds
  • Hardware checksum offload cuts CPU overhead during heavy traffic
  • Wake-on-LAN and VLAN support simplify remote management and segmentation

Specifications

No published specifications for this item yet.

Questions about this item

How many RJ45 ports does this quad-port card provide and what speeds do they auto-negotiate?

The card delivers four independent RJ45 ports that each auto-negotiate 10, 100 or 1000 Mbps with auto MDI/MDIX on Cat5e or Cat6 cable runs up to 100 m.

What real-world throughput can I expect from a single port on a PCIe x1 slot?

A single port runs at full gigabit line rate; the PCIe x1 bus provides enough bandwidth for one 1000 Mbps stream, while four simultaneous streams share the x1 lane.

Which PCIe slot versions and physical sizes are compatible with this x1 adapter?

The x1 edge connector fits x1, x4, x8 or x16 slots and both full-height and low-profile brackets are included for ATX or slim SFF chassis.

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