1: Insuper X540-T2 yzca-00311-101 10G network card, high operating temperature, gets very hot. Use with caution in home computers. 2: Compatibility between 10G network cards and some motherboards may require testing. 3: Incompatible motherboards may not boot or be recognized by the system. 4: Desktop motherboards are preferably used with PCIE x 8/x16 slots managed by Nanqiao. 5: For X540 network card: Requires driver installation for Win 7, Win 8, Win 10, 11. (Note: PC is not supported!!! Professional installation required for Linux. Do not purchase if you are unsure!!!) Compatible with Windows/Windows Server/Linux Supported Systems: Windows Server 2012, 2012R2, 2016, 2019, 2022. Esxi 6.5 / Esxi 6.7 / Esxi 7.0 Redhat 7.6 64bit/7.7 64bit/7.8 64bit/7.9 64bit/8.1 64bit/8.2 64bit/8.3 64bit Suse 12.5 64bit/15.2 64bit/15.3 64bit Ubuntu Desktop 18.04 64bit/20.04 64bit. User Experience Sharing: B75, B85, H67 are not compatible. (J3160, B360, Q370, X570E, H410, X58, X99, C612, Z97, HPZ440, X470 are compatible. More motherboards are unconfirmed.) Some motherboards may not be recognized. Color: As shown. Material: PC+Metal. Package Contents: 1 * Ethernet Card. (Note: Other products are not included. Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.)