Hardware Spec Index

Tessarix NX-4021 Ultra 2.5GbE RJ45 PCIe Network Card

Network Cards · Tessarix · SKU NX4021-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index1,529 (Network Cards scale)
Category rank#49,234
Street price$39
Power2 W
Performance per dollar39.21
Released2021

Specifications

BrandTessarix
ModelTessarix NX-4021 Ultra
Speed2.5GbE (2.5G/1G/100M)
Ports1× RJ45
Host interfacePCIe 3.0 x1
CablingCat5e or better (100 m)
StandardIEEE 802.3bz (2.5G/5GBASE-T)
Jumbo framesUp to 9 KB
OffloadsTSO, checksum offload
Wake-on-LANYes
VLANIEEE 802.1Q
OS supportWindows 11, Linux, FreeBSD

Related guides

2.5GbE, 5GbE and 10GbE NetworkingPCIe Lanes Explained

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Cite this page: Hardware Spec Index, “Tessarix NX-4021 Ultra 2.5GbE RJ45 PCIe Network Card”, https://vextor7.com/item/5108239 (accessed 2026-10-22).