|  |  
        
        
           
            | Option # | Top Level Part #
 | Manufacturing Part #
 | Description | Substitute Part #
 | Previous Part #
 |   
            | X2612A | 595-4710 | 501-4883 [F] | SBus I/O Board with SOC+ | n/a | n/a |   
            | X2622A | 595-4711 | 501-4884 [F] | Graphics I/O Board with SOC+ | n/a | n/a |   
            | X2632A | 605-1604 | 501-4926 [F] | PCI I/O Board | n/a | n/a |   
            | n/a | n/a | 501-4128 [F] | PCI I/O Riser Board (3.3V) | n/a | n/a |   
            | 501-4169 [F] | PCI I/O Riser Board (5V) | n/a | n/a |   
            | X2610A [S] | 595-3922 | 501-4287 [F] | SBus I/O Board | 501-2977 [F] | n/a |   
            | X2611A [S] | 595-4608 | 501-4266 [F] | SBus I/O Board with SOC+ | 501-4883 [F] | n/a |   
            | X2620A [S] | 595-3923 | 501-4288 [F] | Graphics I/O Board | n/a | 501-2749 [F] |   
            | X2630A [S] | 605-1596 | 501-4325 [F] | PCI I/O Board | n/a | n/a |  
           
            | Table Legend |   
            | [F] = Field Replaceable 
              Unit (FRU) [S] = Supported, but can no longer be ordered 
              with this system
 [N] = No longer supported for this system
 |  |