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Intel X520-DA2 Dual Port SFP+ 10GbE NIC Ethernet Server Adapter Yottamark! | eBay
Intel X520 Dual Port 10Gb Direct Attach/SFP+ Server Adapter, Full Height | Dell USA
Intel X520 and X540 Dual Port 10 GbE Adapters for System x and ThinkServer Product Guide (withdrawn product) > Lenovo Press
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