X7402A 512MB DDR Memory Option (2 × 256MB DIMMs) 370-5565 256MB Registered DDR DIMM (SPD 0.0) X7403A 1GB DDR Memory Option (2 × 512MB DIMMs) 370-4939 512MB Registered DDR DIMM (SPD 0.0) X7404A 2GB DDR Memory Option (2 × 1GB DIMMs) 370-4940 1GB Registered DDR DIMM (SPD 0.0) X7602A 512MB DDR Memory Option, SPD 1.0 (2 × 256MB DIMMs) 370-6201 256MB Registered DDR DIMM (SPD 1.0) X7603A 1GB DDR Memory Option, SPD 1.0 (2 × 512MB DIMMs) 370-6202 512MB Registered DDR DIMM (SPD 1.0) X7604A 2GB DDR Memory Option, SPD 1.0 (2 × 1GB DIMMs) 370-6203 1GB Registered DDR DIMM (SPD 1.0) X7702A 512MB DDR Memory Option, SPD 0.0 or 1.0 (2 × 256MB DIMMs) 370-7680 256MB Registered DDR DIMM X7702A-4 512MB DDR1 Memory Option, (2 × 256MB DIMMs), RoHS:YL 371-1115 256MB Registered ECC DDR1 DIMM X7703A 1GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 512MB DIMMs) X7704A 2GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 1GB DIMMs) X7711A-4 4GB DDR Memory Option, SPD 0.0 or 1.0 (2 × 2GB DIMMs)