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BrandIntel
ModelEthernet Converged Network Adapter X710-DA4
Part numberX710-DA4
TypeNetwork card
ConnectorSFP+
InterfacePCIe 3.0 x8
Ports4 x 10GbE
product_codeX710DA4G2P5
DescriptionQuad-port (SFP+) 10GbE network expansion card, 700 Series Network Adapters, PCIe Gen3 x8, Full Height bracket.
Listed for75 NAS models

Manufacturer notes: Compatible only with PCIe slot #1. Compatible only with PCIe slot #2.  

Compatible NAS models

Synology (29)

QNAP (46)

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