X4626A 371-1447 SESX2B2Z Buy 4GB Memory Expansion (2 × 2GB) X-Option, RoHS:Y 511-1161 [C] 2GB DDR2-667/PC2-5300 1.8V FBDIMM, RoHS:Y n/a SESX2C1Z Buy 8GB Memory Expansion (2 × 4GB) X-Option, RoHS:Y 501-7954 [C] 4GB DDR2-667/PC2-5300 1.8V FBDIMM, RoHS:Y n/a SESX2D1Z Buy 16GB Memory Expansion (2 × 8GB) X-Option, RoHS:Y 511-1262 [C] 8GB DDR-667/PC2-5300 1.8V FBDIMM, RoHS:Y n/a SESX2A1Z [S] 2GB Memory Expansion (2 × 1GB) X-Option, RoHS:Y 501-7952 [C] 1GB DDR2-667/PC2-5300 1.8V FBDIMM, RoHS:Y n/a SESX2A2Z [S] 2GB Memory Expansion (2 × 1GB) X-Option, RoHS:Y 511-1264 [C] Buy 1GB DDR2-667/PC2-5300 1.8V FBDIMM, RoHS:Y n/a SESX2B1Z [S] 4GB Memory Expansion (2 × 2GB) X-Option, RoHS:Y 501-7953 [C] 2GB DDR2-667/PC2-5300 1.8V FBDIMM, RoHS:Y