Guaranteed compatible upgrades for:

IBM/Lenovo ThinkCentre A55 9636, 9640, 9641-xxx


System Specifications
Maximum Memory:
  • 4GB
Expansion:
  • 2 Sockets
Standard Memory:
  • 256MB (Removable) or
  • 512MB (Removable) or
  • 1GB (Removable)
CPU/Chipset:
  • Intel Pentium 4 Intel 946GZ
  • Intel Celeron D Intel 946GZ
  • Intel Pentium D Intel 946GZ
Bus Architecture:
  • PCI; PCI Express; SSD - SATA 2.5-inch 9.5mm
Mfr's System P/N's:
  • 9636-xxx; 9640-xxx; 9641-xxx
Upgrade Path:
  • Virtually any configuration up to 4GB can be reached using any combination of 512MB, 1GB and 2GB modules.