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: Material:PC+Metal Package Contents: 1 * Ethernet Card Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!