A Network interface card, NIC, or Network card is an electronic device that connects a computer to a computer network, usually a LAN. It is considered a piece of computer hardware. Today, most computers have network cards.

Network cards let a computer exchange data with the network. To achieve the connection, network cards use a suitable protocol, for example CSMA/CD. Network cards usually implement the first two layers of the OSI model, that is the physical layer, and the data link layer. Today, most network cards use Ethernet. 

Network Card 1000 mbps

The PCI-based 10/100/1000 Mbps Gigabit Ethernet Network Adapter Card provides a simple connection to a Gigabit Ethernet network, and is fully compatible with IEEE 802.3, 802.3u, 802.3ab and 802.3x standards.

Suitable for any PCI-enabled client, server or workstation, the Gigabit Ethernet Network Adapter Card supports high performance dual channel networking and maximum data transfer speeds of 1000Mbps in each direction (2000 Mbps total) - up to ten times faster than 10/100 Ethernet.

Compatible with a broad range of operating systems, including Linux, Windows 10, 8/8.1, 98SE, ME, 2000, XP, XP-64bit, Vista, Vista-64bit, 7, 7-64bit as well as Mac OS 10.4, this high quality PCI Gigabit NIC includes an optional low profile bracket that makes it easy to install the card in a small form factor/low profile computer case/server.

Gigabit Ethernet Card

The 10/100/1000Mbps Gigabit PCIe Network Adapter is a highly integrated and cost-effective 32-bit Gigabit PCIe Ethernet Adapter that is fully compliant with IEEE 802.3, IEEE 802.3u and IEEE 802.3ab specifications.

The PCIe Gigabit Network Adapter is a high performance adapter designed for high-speed PCI Express Bus Architecture. Designed to support 10/100/1000Mbps network speed Auto-Negotiation, 802.3x flow control, and Wake-on-LAN technology. The Gigabit PCIe Network Adapter is a highly integrated and cost-effective Gigabit Ethernet Adapter which is a great choice to upgrade your network.

Summary

Switching over to gigabit (1000-Mbps) speeds increases your potential throughput tenfold, minimizing your transfer times and greatly enhancing your ability to stream high-bandwidth files to connected devices without interference. Gigabit networking is now a sufficiently common feature of modern networking devices that it shouldn't carry too great a cost premium. As for your motherboards, the odds are good that they already have gigabit functionality built in, whether you know it or not. Before we go any further, I should note that this guide does not apply to wireless networks; the factors that constrain speeds on wireless networks are entirely different from those that limit speeds on wired networks.