SunPC 133-MHz 5X86 SBUS Expansion Card. This expansion card has an AMD 5x86 processor with a clock speed of 133 MHz and 16MB of Memory. SunPC version 4.1 is included. Supported workstations include Sun SPARCstation?s and Ultra desktops (Ultra 1 and Ultra 2) running Solaris 2.3 and above. Supported Guest Operating systems include DOS, Windows 3.11 and Windows 95. Comes in original box with software & manuals. CPU part number is 501-4230.