Hardware Spec Index

Tessarix NX-4251 Ultra Dual-Port 25GbE SFP28 PCIe Network Card

Network Cards · Tessarix · SKU NX4251-ULTRA · Released 2023 · Updated 2026-10-20

Key facts

Benchmark index5,041 (Network Cards scale)
Category rank#13,412
Street price$399
Power8 W
Performance per dollar12.63
Released2023

Specifications

BrandTessarix
ModelTessarix NX-4251 Ultra
Speed25GbE (25G)
Ports2× SFP28
Host interfacePCIe 4.0 x8
CablingDAC or optical transceiver
StandardIEEE 802.3by (25GBASE-R)
Jumbo framesUp to 9 KB
OffloadsTSO, LRO, RSS, SR-IOV
Wake-on-LANYes
VLANIEEE 802.1Q
OS supportWindows 11, Linux, FreeBSD

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Cite this page: Hardware Spec Index, “Tessarix NX-4251 Ultra Dual-Port 25GbE SFP28 PCIe Network Card”, https://vextor7.com/item/825829 (accessed 2026-10-20).