| Memory | 
| Option # | Manufacturing Part #
 | Description | Previous Part #
 | 
| SESX2B2Z  Price | 4GB Memory Expansion (2 × 2GB) X-Option, | 
| 511-1161
 [C] | 2GB DDR2-667/PC2-5300 1.8V FBDIMM, | n/a | 
| SESX2C1Z  Price | 8GB Memory Expansion (2 × 4GB) X-Option, | 
| 501-7954
 [C] | 4GB DDR2-667/PC2-5300 1.8V FBDIMM, | n/a | 
| SESX2D1Z  Price | 16GB Memory Expansion (2 × 8GB) X-Option, | 
| 511-1262
 [C] | 8GB DDR-667/PC2-5300 1.8V FBDIMM, | n/a | 
| SESX2A1Z
 [S] | 2GB Memory Expansion (2 × 1GB) X-Option, | 
| 501-7952
 [C] | 1GB DDR2-667/PC2-5300 1.8V FBDIMM, | n/a | 
| SESX2A2Z
 [S] | 2GB Memory Expansion (2 × 1GB) X-Option, | 
| 511-1264
 [C] | 1GB DDR2-667/PC2-5300 1.8V FBDIMM, | n/a | 
| SESX2B1Z
 [S] | 4GB Memory Expansion (2 × 2GB) X-Option, | 
| 501-7953
 [C] | 2GB DDR2-667/PC2-5300 1.8V FBDIMM, | n/a |