Gigabit and 2.5G network cards add or replace the wired Ethernet connection in a desktop PC, workstation or server. Our range of over 30 models is mostly PCI Express cards, with one USB adapter and one Mini PCI Express card, from brands including StarTech.com, Intel, TP-Link and HP.
How to choose a gigabit or 2.5G network card
Connection type. Most cards in our range use PCI Express, which suits desktop PCs and servers with a free slot. Check whether your case needs a low-profile bracket. The USB adapter suits laptops and small PCs without a spare slot, and the Mini PCI Express card is meant for compact or embedded boards.
Speed. Buy the speed your router, switch and cabling can actually use. Gigabit (1000 Mbit/s) cards are the largest group, and the range also includes 2.5G and 5G models plus one 10G card. 2.5G generally runs over ordinary Cat5e cable, while 10G usually calls for better cabling such as Cat6a.
Number of ports. Most cards have a single RJ-45 port, which is enough to connect one PC to a network. A dual-port card, of which we stock one, makes more sense in a firewall, a router build or a server that needs separate network connections or a backup link.
Operating conditions and drivers. Operating temperature ranges differ between cards, from 0 to 40 °C up to 0 to 70 °C. The wider ranges matter in server cabinets, hot enclosures and industrial setups. Also confirm that drivers exist for your operating system, particularly if you run Linux, a hypervisor or Windows Server.
Network card brands we carry
- StarTech.com: a maker of connectivity accessories for IT professionals, and the brand with the most network cards in this category, including PCI Express and USB adapters.
- Intel: designs its own Ethernet controllers, and its cards are widely supported by Windows, Linux and virtualisation software.
- TP-Link: best known for home and small-office networking, with network cards that pair easily with its routers and switches.
- HP and HPE: HP Inc. makes PCs and workstations, while HPE builds servers, so their adapters suit systems from those manufacturers.
Also in our range: LogiLink, DIGITUS, Cudy, Ubiquiti Networks and Lanberg.
Gigabit and 2.5G network card FAQ
Do I need a 2.5G network card instead of a gigabit one?
You only need 2.5G if the rest of your network can use it. That means a router or switch with 2.5G ports, or a fast NAS or second PC. If everything else is gigabit, a gigabit card gives the same speed in practice.
Will a 2.5G card work with a gigabit router?
Yes, it will work. The card and router agree on the highest speed both support, so the link runs at 1000 Mbit/s. Many multi-speed cards also fall back to 100 or 10 Mbit/s with older equipment.
Can I use Cat5e cable with a 2.5G network card?
In most cases, yes. 2.5G Ethernet is designed to run over standard Cat5e cable at normal home and office lengths. Faster 5G and 10G speeds are more demanding, and Cat6 or Cat6a cabling is the safer choice for them.
Should I choose a PCI Express or a USB network adapter?
A PCI Express card is the better choice for a desktop PC or server with a free slot, as it connects directly to the motherboard. A USB adapter is simpler to fit and works with laptops and small PCs that have no slot. Check the port type and the speed you need before buying.
