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Green rectangular server motherboard with silver LGA2066 CPU socket, eight black DIMM slots and multiple PCIe expansion slots

HP

HP Z4 G4 Workstation Motherboard LGA2066 L09990-001 L12125-001 L12125-601

SKU CH-JXX3-C0MR1

Supports Intel Core X processors with eight memory slots and multiple PCIe lanes

  • CPU TypeIntel Core i7
  • LGA2066 socket fits Intel Core X series CPUs
  • Eight memory slots allow large capacity configurations
  • Single 1GbE LAN port provides wired network connectivity
  • One M.2 slot supports fast storage expansion
  • Five PCIe slots enable multiple add-in cards

Socket LGA2066 workstation board

The HP Z4 G4 motherboard uses an LGA2066 socket for Intel Core X series processors. Eight memory slots provide high-capacity RAM support for compute-intensive tasks. A single 1GbE LAN port handles wired network connectivity. This board targets professionals rebuilding or servicing compatible HP workstation systems.

Verify chassis and power layout

Confirm your chassis accepts the proprietary HP Z4 G4 form factor and mounting points before ordering. Check that the power supply delivers the required connectors for this board revision. Ensure the single M.2 slot matches the keying and length of your intended storage device. The six PCI slots use specific spacing that may limit card selection.

Bundled part numbers aid identification

The L09990-001, L12125-001 and L12125-601 WIN labels identify the board assembly and Windows-licensed variant. Reference M09984-001 and REV 0H when matching firmware or service documentation. No cables, I/O shield or CPU cooler are mentioned in the supplied data. Buyers needing those items must source them separately.

Highlights

  • LGA2066 socket fits Intel Core X series CPUs
  • Eight memory slots allow large capacity configurations
  • Single 1GbE LAN port provides wired network connectivity
  • One M.2 slot supports fast storage expansion
  • Five PCIe slots enable multiple add-in cards

Specifications

CPU TypeIntel Core i7

Questions about this item

Does the HP Z4 G4 motherboard include the CPU, memory or any cables in the box?

The board is supplied as a standalone unit with part numbers L09990-001, L12125-001 and L12125-601; you must add an LGA2066 Intel Core X processor, memory modules for the eight slots, a graphics card for the PCIe x16 slots, storage drives and a compatible chassis with power supply.

Which of the three part numbers — L09990-001, L12125-001 or L12125-601 — should I choose for my build?

L09990-001 is the assembly number, L12125-001 is the standard spare part and L12125-601 is the Windows‑branded spare; all three refer to the same revision 0H board with identical LGA2066 socket, eight memory slots, single 1 GbE LAN, one M.2 slot and five PCIe slots.

What does the single 1 GbE LAN port mean for daily use in a workstation?

It provides one wired Gigabit Ethernet connection for network access; if you need a second network link or faster 10 GbE you will have to add a discrete network card in one of the PCIe x16, x8 or x4 slots.

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