I guess I should have been more clear. These are just cards, not complete systems. Joe All of this stuff came from NASA KSC and is in original SUN boxs. I don't know if it's new or was pulls during an upgrade. I believe the specs are correct but I didn't spend any time checking them. Sun Super Sparc 10 30Mhz MBUS CPU CARD PN 501-1889, 501-2239 SM30. For Sparc 10 only so I've been told. Two Differential SCSI/Ethernet (DSBE/S) Cards. PN 501-1902 Workstations: Sun 4/75, SPARCstation 5, 10, 20 Ultra 1, 1E, 2 Servers: SPARCserver 6x0MP, 1000, PARCcenter 2000 Enterprise 3x00, 4x00, 5x00, 6x00, 10000 Option 1052 Sun PN 501-2270 SM 41 X1161A 40 Mhz CPU CARD for Sparc 10 and SS600MP Model 41.