HP Z2 G4 Tower Workstation upgrades

Released 2018 · on sale

Tower chassis only. The Z2 G4 SFF is a different machine (2 DIMM slots, 64 GB max, 2.5"-only storage) despite sharing the name. Also present but not upgrade slots: 1x M.2 2230 WLAN slot (PCIe Gen3 x1 + CNVi) and an optional front SD card reader. HP supports only HP-qualified PCIe cards on the Gen3 x16 slot for warranty purposes.

Upgrade guide → What fits, step by step, and official documents.

4x DDR4 DIMM (UDIMM), 128 GB max: 4 × DDR4 DIMM · up to 128 GB total · 2666 MT/s
2x 3.5" + 2x 5.25" bays, 2x M.2 NVMe (<=110mm): 6 × SSD / HDD 3.5" / M.2 2242 / M.2 2260 / M.2 2280 / M.2 22110 (SATA / NVMe)
LGA1151v2 (C246), 8th/9th-gen Intel: LGA1151 (8th/9th gen) · Core 8th gen, Core 9th gen

Slot map

Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

4x DDR4 DIMM (UDIMM), 128 GB max 4 × DDR4 DIMM · up to 128 GB total · 2666 MT/s

Desktop DIMMs (not SO-DIMM), unbuffered UDIMM only - no RDIMM/LRDIMM. ECC vs non-ECC is CPU-dependent: Xeon E/i3/Pentium accept either, Core i5/i7/i9 are non-ECC only; never mix types. 2400 MT/s CPUs (i3-8100, G5400) cap RAM at 2400 regardless of DIMM rating. HP validated 32 GB DIMMs / 128 GB total although Intel's spec tops at 64 GB, so third-party 32 GB DIMMs aren't guaranteed. Install matched pairs (DIMM1&3, DIMM2&4).

No compatible offers right now.

2x 3.5" + 2x 5.25" bays, 2x M.2 NVMe (<=110mm) 6 × SSD / HDD 3.5" / M.2 2242 / M.2 2260 / M.2 2280 / M.2 22110 (SATA / NVMe)

4 SATA 6 Gb/s ports total (one can be routed eSATA); the ODD consumes one if fitted, so a 3rd/4th SATA drive needs a 5.25"-to-3.5" carrier in a half-height external 5.25" bay - add a PCIe HBA beyond that. M.2 slots are PCIe Gen3 x4 NVMe, drives <=110 mm; M.2 SATA support is not documented - verify before buying. No per-bay capacity limit published. Intel RST RAID 0/1/5/10 (RAID 5 discouraged over 500 GB).

No compatible offers right now.

LGA1151v2 (C246), 8th/9th-gen Intel LGA1151 (8th/9th gen) · Core 8th gen, Core 9th gen

Single socketed LGA 1151 (Coffee Lake / 8th-9th gen) on Intel C246: Core i3-i9, Pentium Gold, Xeon E-2100/E-2200. Update BIOS before installing a 9th-gen or Xeon E-22xx CPU - early BIOS only supports 8th-gen/E-2100. A Xeon/i3/Pentium swap unlocks ECC memory support. No numeric TDP cap published, but validated parts reach 95 W (i9-9900K, i7-9700K, Xeon E-2286G) - ensure the unit has the higher-performance heatsink. Core i-series configs are Windows 10-only per HP.

No compatible offers right now.