Guaranteed compatible upgrades for:

HP/Compaq Z Series Workstation Z800

System Specifications
Maximum Memory:
  • 192 GB RDIMM
  • 12 Sockets (4 Banks of 3)
Standard Memory:
  • 4 GB (Removable) or
  • 6 GB (Removable) or
  • 12 GB (Removable)
  • Intel Xeon Intel 5520
  • Intel Xeon Intel 5520
Bus Architecture:
  • PCI; PCI Express; PCI-X; SSD - SATA 2.5-inch 9.5mm; USB
Mfr's System P/N's:
  • FF825AV; FG639EC; FL848UA; FL849UA; FL850UA; FL851UA; FL875UT; FL876UT; FL877UT; FL878UT; FL879UT; FL881UT; FX465AV; KK533EA; KK543EA; KK544EA; KK561EA; KK562ET; KK563EA; KK564ET; KK577EA; KK584ET; KK599ET; KK600ET; KK604EA; KK629EA; KK644EA; KK658ET; KK659ET; VA789UA
Upgrade Path:
  • Registered DIMMs (RDIMMs):
  • DDR3 1333MHz speed requires Intel Xeon X5550 or higher processors.
  • 1066MHz requires Xeon E5520 or higher, Xeon E5506 or lower support 800MHz only.
  • Memory speed will be reduced as the number of modules installed increases.
  • 1333MHz is supported with one DIMM per channel only using Xeon X55xx series.
  • DDR3-1333 modules can automatically clock down to 1066MHz and 800MHz depending on module configuration or processor model installed.
  • Due to chipset limitations, DDR3 Quad Rank memory will operate at 1066MHz in the first Triple Channel bank.
  • Adding Quad Rank modules in the second Triple Channel bank will operate at 800MHz.
  • This system supports either Registered ECC or Unbuffered ECC memory.
  • Mixing Registered ECC and Unbuffered ECC modules is not supported within this system.
  • 4GB DDR3-1333 Reg ECC modules come in two versions: 313/4G using x4 and 3138/4G using x8 DRAM.
  • The two parts may be installed in the same system but not within the same memory bank.
  • Use like modules for dual and triple channel operation