| Memory | 
| Option # | Manufacturing Part #
 | Description | Previous Part #
 | 
| X7403A
 [S] | 1GB DDR Memory Option (2 × 512MB DIMMs) | 
| 370-4939 21
 [F] | 512MB Registered DDR DIMM (SPD 0.0) | n/a | 
| X7404A
 [S] | 2GB DDR Memory Option (2 × 1GB DIMMs) | 
| 370-4940 23
 [F] | 1GB Registered DDR DIMM (SPD 0.0) | n/a | 
| X7603A
 [S] | 1GB DDR Memory Option, SPD 1.0 (2 × 512MB DIMMs) | 
| 370-6202 | 512MB Registered DDR DIMM (SPD 1.0) | n/a | 
| X7604A
 [S] | 2GB DDR Memory Option, SPD 1.0 (2 × 1GB DIMMs) | 
| 370-6203 | 1GB Registered DDR DIMM (SPD 1.0) | n/a | 
| X7703A
 [S] | 1GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 512MB DIMMs) | 
| 370-7670 | 512MB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster | n/a | 
| X7703A-4
 [S] | 1GB DDR Memory Option, (2 × 512MB DIMMs), L | 
| 370-7972 24 | 512MB PC2700 DIMM, | n/a | 
| 371-1116 | 512MB Registered ECC DDR1 DIMM (SPD 0.0 or 1.0) PC2100 & faster, L | n/a | 
| X7704A
 [S] | 2GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 1GB DIMMs) | 
| 370-7671 | 1GB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster | n/a | 
| X7704A-4
 [S] | 2GB DDR1 Memory Option, (2 × 1GB DIMMs), L | 
| 370-7973 25 | 1GB PC2700 DIMM, | n/a | 
| 371-1117 | 1GB Registered ECC DDR1 DIMM (SPD 0.0 or 1.0) PC2100 & faster, L | n/a | 
| X7711A
 [S] | 4GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 2GB DIMMs) | 
| 370-7672 | 2GB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster, L | n/a | 
| X7711A-4
 [S] | 4GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 2GB DIMMs), L | 
| 370-7672 | 2GB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster, L | n/a | 
| 370-7974 | 2GB PC2700 DIMM, | n/a | 
| n/a | 540-6229 15
 [F] | 1GB DDR FRU, SPD 1.0 (2 × 512MB DIMMs) | n/a | 
|  | 512MB Registered DDR DIMM (SPD 1.0)
 | n/a | 
| n/a | 540-6230 16
 [F] | 2GB DDR FRU, SPD 1.0 (2 × 1GB DIMMs) | n/a | 
|  | 1GB Registered DDR DIMM (SPD 1.0)
 | n/a | 
| n/a | 540-6400
 [F] | 1GB DDR FRU, SPD 0.0/1.0 (2 × 512MB DIMMs) | n/a | 
|  | 512MB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster
 | n/a | 
| n/a | 540-6401
 [F] | 2GB DDR FRU, SPD 0.0/1.0 (2 × 1GB DIMMs) | n/a | 
|  | 1GB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster
 | n/a | 
| n/a | 540-6402
 [F] | 4GB Memory FRU (2 × 2GB DIMMs), L | n/a | 
|  | 2GB Registered DDR DIMM (SPD 0.0 or 1.0) PC2100 & faster, L
 | n/a | 
|  |  | n/a | 
| n/a | 540-6776
 [F] | 1GB Memory FRU (2 × 512MB DIMMS), L | n/a | 
|  |  | n/a | 
|  | 512MB Registered ECC DDR1 DIMM (SPD 0.0 or 1.0) PC2100 & faster, L
 | n/a | 
| n/a | 540-6777
 [F] | 2GB Memory FRU (2 × 1GB DIMMS), L | n/a | 
|  |  | n/a | 
|  | 1GB Registered ECC DDR1 DIMM (SPD 0.0 or 1.0) PC2100 & faster, L
 | n/a |