Intel TDSourcing X520 Dual Port 10GbE SFP+ Embedded Adapter - Network adapter - PCIe 2.0 x8 low profile - 10Gb Ethernet SFP+ x 2 - FRU/ (CRU) - Tier 1 - for Lenovo System x iDataPlex dx360 M4 7912/ System x3550 M4 7914/ x3650 M4 7915/ x3650 M4 HD