|  |  
        
        
           
            | Option # | Top Level Part #
 | Manufacturing Part #
 | Option Description | Substitute Part #
 |   
            | X6179A | 595-6751 | 370-5676 [F] (128MB) | 128MB (1 × 128MB SDRAM DIMM) | n/a |   
            | X6180A | 595-6752 | 370-5677 [F] (256MB) | 256MB (1 × 256MB SDRAM DIMM) | n/a |   
            | X6181A | 595-6753 | 370-5678 [F] (512MB) | 512MB (1 × 512MB SDRAM DIMM) | n/a |  
            | 
 |  
            | The Sun Blade 100 memory parts shown below were
              shipped in some Sun Blade 150 systems, although not all vendors'
              DIMMs represented by these numbers will work in the 150.  Orders
              for these parts are being monitored to ensure that only
              qualified replacement DIMMs are shipped for installation in
              the Sun Blade 150.  It is recommended that the new part numbers
              shown above be used for replacement orders. |   
            | X6991A | 595-5621 | 370-4149 [F] (128MB) | 128MB (1 × 128MB SDRAM DIMM) | n/a |   
            | X6992A | 595-5622 | 370-4150 [F] (256MB) | 256MB (1 × 256MB SDRAM DIMM) | n/a |   
            | X6993A | 595-5623 | 370-4151 [F] (512MB) | 512MB (1 × 512MB SDRAM DIMM) | 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
 |  |