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BrandIntel
ModelEthernet Converged Network Adapter X520-T2
Part numberX520-T2
TypeNetwork card
ConnectorRJ45
InterfacePCIe 2.0 x8
Ports2 x 10GbE
product_codeE10G42BT
DescriptionDual-port 10 Gigabit network adapter, cat6A cable
Listed for106 NAS models

Manufacturer notes: Intel Ethernet Converged Network Adapters (X520/X540) from Dell is not supported. A specific bracket is required on the TS-879 Pro, TS-1079 Pro models. For the information of network card installation, please refer to chapter 6 in the  Turbo NAS Hardware Manual . An optional purchase bracket is required for TS-879 Pro and TS-1079 Pro models.

Compatible NAS models

Synology (14)

QNAP (92)

Source: QNAP's official compatibility list. Always check the slot, bracket, OS version and installation notes for your NAS before buying.