Guaranteed compatible upgrades for:

IBM/Lenovo ThinkStation S20 (5520) 4155, 4158, 4218-xxx


System Specifications
Maximum Memory:
  • 48GB ECC UDIMMs
  • 96GB Reg ECC RDIMMs
Expansion:
  • 6 Sockets (2 banks of 3) per CPU 12 Sockets (4 banks of 3) using two CPUs
Standard Memory:
  • 2GB (Removable) or
  • 4GB (Removable)
CPU/Chipset:
  • Intel Xeon Intel 5520
Bus Architecture:
  • PCI; PCI Express; SSD - SATA 2.5-inch 9.5mm
Mfr's System P/N's:
  • 4155-xxx; 4158-xxx; 4218-xxx
Upgrade Path:
  • Virtually any configuration up to 96GB can be reached using 2, 4, and 8GB modules.