Attention:The compatibility between the 10G network card and some motherboards needs to be tested.Incompatible motherboards generally fail to boot or are not recognized by the system.The desktop motherboard prioritizes the use of PCIE x 8/x16 slots managed by Nanqiao.Regarding X540 network card: Win7 Win8 Win 10 11 requires driver installation.(Attention!!! MAC PC not supported!!! To install Linux, you need a profeional. If you are not familiar, please do not purchase!!)Support system: Windows Server 2012R220620192022.VMware Ei 6.5/VMware Ei 6.7/VMware Ei 7.0Redhat 7.6 64 bit/Redhat 7.7 64 bit/Redhat 7.8 64 bit/Redhat 7.9 64 bit/Redhat 8.1 64 bit/Redhat 8.2 64 bit/Redhat 8.3 64 bit/Use 12.5 64 bit/Suse 15.2 64 bit/Suse 15.3 64 bit/Ubuntu Desktop 18.04 64 bit/Ubuntu Desktop 20.04 64 bit.Sharing usage experience. B75, B85, and H67 cannot be used. (J3160, B360, Q370, X570E, H410, X58, X99, C612, Z97, HPZ440, Asus X470, verified to be usable. There are more unconfirmed motherboards, please feel free to leave a meage and share.) Thank you for your attention, There are so many useful and cheap item in our store. If you need more this item ,you can contact us.we will give you our best price. Leave your meage!