Sun Microsystems PCI - GigaSwift Ethernet UTP (Copper RJ-45). Due to availability issues we recomend buying the newer / less expensive model the X4150A-2. X4150A-2 We guarantee it will work in every machine that the X4150A worked in. Note..Minimum OS for X1150A, X3150A is Solaris 2.6. Minimum OS for X4150A, X4150A-2 is Solaris 7.