Guaranteed compatible upgrades for:

HP/Compaq Presario CQ4000 Series Desktop CQ4128HK

System Specifications
Maximum Memory:
  • 4GB
  • 2 Sockets
Standard Memory:
  • 1GB (Removable) or
  • 2GB (Removable) or
  • 3GB (Removable)
  • Intel Pentium Dual Core 2.93 GHz Intel G41
Bus Architecture:
  • PCI; PCI Express; SSD - SATA 2.5-inch 9.5mm; SSD - SATA 3.5-inch; USB
Mfr's System P/N's:
  • AY742AA
Upgrade Path:
  • Up to 4GB can be reached using 2GB modules.