The bottom line The only four-socket card on this shelf and the least described one. What it is for is obvious; what it wants from the machine, what chip it carries and what will drive it are all questions the page leaves open.
On the listing
A PCIe server network card at 2.5-gigabit Ethernet with four RJ45 ports; a two-lane PCI Express bus connection with up to 10 Gbps of bus width; a PCI Express interface given as ×4; an integrated 10M BASE-Te and 100/1000M and 2.5G base-T transceiver compatible with 802.3; support for a 2.5G and a 1G Lite mode; and pair swap, polarity and skew correction with crossover detection and automatic correction.
Two lanes, or four
A two-lane bus connection in the first bullet. A ×4 interface in the second. They sit one line apart. A card can of course be physically ×4 and wired for fewer lanes, which is exactly the trap the buying advice on this hub warns about at the other end — but that is a reading, not a statement, and this page makes no statement. Both figures are printed here and neither is chosen.
Four ports and one bus figure
Four sockets at 2.5 gigabits, and one published figure for the bus behind them, given as up to 10 Gbps of bus width. The figure belongs to the connection into the machine rather than to any socket, and the page says so in those words. What four busy sockets do to it is not described.
No operating system named at all
Not Windows, not Linux, not a hypervisor. On a card described in its own title as a server card, and carrying an unnamed transceiver, that leaves the driver question entirely to whatever the machine already has.
Before ordering
Ask the seller two things: how many lanes the connector actually uses, and which chip is on the board. The second answer makes the driver question solvable, and the page does not answer either.
Availability
Priced from 70 € to 93 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.
It is stocked on the American and British Amazon stores as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.
Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.
Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
Four sockets from one slot, which is what puts this card in a machine acting as a router or a firewall rather than in a desktop
Publishes a whole-card bus figure, up to 10 Gbps of bus width, which no other page here attempts
Names pair swap, polarity and skew correction together with crossover detection, which is the detail of a transceiver rather than a headline
Compromises
Two lane figures on the same page, a two-lane connection in one bullet and a ×4 interface in the next, with nothing to resolve them
No operating system is named at all, on a card whose whole purpose is to be installed in a machine that has a job to do
No controller, no brackets and no contents list, so what arrives in the box and what driver it wants are both unknown before it is opened
Specifications
PCIe generation
Not published on the listing — no generation number appears in the title or in any of the five bullets. What the first bullet gives instead is a bus figure: a PCI Express bus connection of up to 10 Gbps of bus width
Lane count
Stated twice and not identically. The first bullet describes a two-lane PCI Express bus connection; the second gives the PCI Express interface as ×4. Both figures are printed here because both are published, and nothing on the page decides between them
Port speed standard
2.5G base-T with 10M BASE-Te and 100/1000M base-T — stated in the third bullet as an integrated transceiver compatible with 802.3, and the fourth adds support for a 2.5G and 1G Lite mode
Port count
Four — stated in the title as a four-port RJ45 card. It is the highest socket count on this shelf
Controller family
Not published on the listing — the third bullet names an integrated transceiver and never says whose it is or what it is called, on a card whose four sockets make the driver question larger rather than smaller
Bracket heights supplied
Not published on the listing — no bracket, no case size and no contents list appears in the title or in any of the five bullets
Cooling arrangement
Not published on the listing — no heatsink, no fan and no reference to temperature appears anywhere on the page
Stated operating system support
Not published on the listing — not one operating system is named in the title or in any of the five bullets, which on a card described as a server card is the single largest blank on this shelf
Amazon reference
B0C7KRJNM1 (same reference on 6 Amazon marketplaces)
EAN
4016032487968
The questions that come up before an order
Why do a lane count and a bus width appear on the same page?
Because they are two ways of describing the same path into the machine: how many lanes it uses, and how much the maker says that path is worth. Here the two bullets give the lanes as two in one line and as four in the next, while the bus figure of up to 10 Gbps stands on its own. All three are reported and none is combined with another.
What does a four-socket card do that four separate cards do not?
It uses one connector instead of four, which is the difference between a small machine being able to route between several networks and not. The trade is that all four sockets share one path into the processor, and on this page that path is described in two ways that do not agree.
two RJ45 sockets · 2500/1000/100/10 BASE-T · PCIe 3.1 ×1 · dual Intel I226 SRKTU with an ASM bridge · high and low brackets · jumbo frames to 9.5 KB
The only card on this shelf that publishes a PCIe generation and a lane count, and it puts two 2.5-gigabit sockets behind a single lane and says so.
Best for: A small server or a workshop machine that needs two separate 2.5-gigabit sockets from one slot, where the ×1 requirement is a fit rather than a compromise.
one 2.5GBASE-T socket · 2.5G / 1G / 100M · no PCIe generation printed · no lane count printed · two brackets · Wake-on-LAN and QoS named
A single-socket 2.5-gigabit card that names its Ethernet standard, its brackets and its operating systems, and never says which PCIe generation or how many lanes it wants.
Best for: A desktop machine whose motherboard socket has been outgrown, where the case may be a small one and where the buyer already knows what the free slot is wired for.
2500/1000/100 Mbit/s · Realtek RTL8125B named · fits ×1, ×4, ×8 and ×16 connectors · two brackets · port count printed both ways
A 2.5-gigabit card that names its controller and lists every connector it fits, and whose own page counts its Ethernet socket once in the singular and once in the plural.
Best for: A machine where the driver situation has to be settled in advance, since the controller is named and its support can be checked before anything is ordered.
