|  | 
| Memory |  
| Option # | Manufacturing Part #
 | Description | Previous Part #
 |  
| X5288A-Z | 4GB (2 × 2GB) Memory Option, L |  
| 540-7062 [C] | 4GB (2 × 2GB) Memory FRU, | n/a |  
|  | 2GB Registered ECC DDR2-667/PC2-5300 DIMM, 
 | n/a |  
| X5287A-Z
 [S] | 2GB (2 × 1GB) Memory Option, |  
| 540-7061 [C] | 2GB (2 × 1GB) Memory FRU, | n/a |  
|  | 1GB Registered ECC DDR2-667/PC2-5300 DIMM, 
 | n/a |  
| X5289A-Z
 [S] | 8GB (2 × 4GB) Memory Option, L |  
| 540-7063 [C] | 8GB (2 × 4GB) Memory FRU, | n/a |  
|  | 4GB Registered ECC DDR2-667/PC5300 DIMM, 
 | n/a |  
| Table Legend |  
| [F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU)
 [S] = Supported, but can no longer be ordered with this system
 [N] = No longer supported for this system
 Price = Price this Part
 |  |