1: Insuper X540-T2 yzca-00311-101 Greater than 10G network card, high operating temperature, hot hands. If you are a home computer 2: the compatibility between 10G network card and some motherboards needs to be tested. 3: incompatible motherboard generally can not start or enter the system is not recognized. 4: desktop mainboard is preferentially used with PCIE x 8/x16 slot managed by Nanqiao. 5: about the X540 network card: for Win 7 Win 8 Win 10 11 requires an installed driver.(Note!!!MAC PC Not supported !!! To install for Linux, you need a professional. If you don't understand, don't buy!!!) Compatible for Windows/for Windows server/for Linux 1: Support system: for Windows Server 2012, 2012R2,2016,2019,2022. VMware Esxi 6.5 /VMware Esxi 6.7 /VMware Esxi 7.0 Redhat 7.6 64bit/Redhat 7.7 64bit/Redhat 7.8 64bit/Redhat 7.9 64bit/Redhat 8.1 64bit/Redhat 8.2 64bit/Redhat 8.3 64bit/Suse 12.5 64bit/Suse 15.2 64bit/Suse 15.3 64bit/Ubuntu Desktop 18.04 64bit/Ubuntu Desktop 20.04 64bit. 2: Use experience sharing. B75,B85,H67 Cannot be used (J3160,B360,Q370,X570E,H410,X58,X99,C612,Z97,HPZ440,Asus X470, Validation can be used. There are more motherboards not confirmed.) 3: Some motherboards are not recognized, such as GIGABYTE Colour: As Shown Material: PC+Metal Package Contents: 2 * Ethernet Card