HP Z6 G5 Workstation

HP's single-socket Xeon W-3400/W-3500 (LGA4677, Intel W790) tower workstation with 8 DDR5 ECC RDIMM slots (up to 1 TB with 128 GB 3DS RDIMMs), six PCIe slots and room for three double-width GPUs. Sits between the Z4 G5 and the dual-socket Z8 G5 for simulation, rendering and multi-GPU work.

Memory

Slots: 8 DDR5 DIMM slots
Type: DDR5 registered ECC: 16/32/64 GB RDIMMs and 128 GB 3DS RDIMMs; NVDIMM not supported
Speed: 4800 MT/s at 1 DIMM per channel, 4400 MT/s at 2 DIMMs per channel; CPU sets the final speed
Max: 1 TB (8 × 128 GB 3DS RDIMM); 512 GB with 64 GB RDIMMs
Rules: RDIMMs and 3DS RDIMMs cannot be mixed; 64 GB RDIMMs cannot be mixed with other capacities; 128 GB DIMM configurations need the 1125 W or 1450 W PSU
Cooling: 32 GB or larger RDIMMs need the HP Z6 Memory Cooling Solution (56Q82AA) when added after purchase

Storage

Bays: 2 internal 3.5" (acoustic dampening rails) + 2 external 5.25" (175 mm depth limit; only 1 external drive factory-configurable) + 1 dedicated 9.5 mm slim optical bay
M.2: 2 onboard M.2 PCIe Gen4 x4 slots (devices up to 80 mm)
Front NVMe: 2 SlimSAS PCIe Gen4 x8 connectors for the HP CRU QX448 front removable carrier (four x4 M.2 in total, hot-swap)
PCIe SSD cards: HP Z Turbo Drive Dual Pro (PCIe 4.0 x4 carrier, 56Q86AA) and Z Turbo Drive Quad Pro (PCIe 4.0 x16 carrier, 7H9Z3AA)
Z Turbo M.2 drives: 512 GB to 8 TB PCIe 4.0 x4 TLC, SED OPAL2 versions available
SATA: 5 SATA ports; 1/2/4/8/12 TB 7200 rpm enterprise HDDs (HDD kits need the Z6 HDD Cable Kit 73P26AA)
RAID: RAID 0/1/5/10; Intel VROC Standard (3FJ80AA, RAID 0/1/10) or Premium (3FJ81AA, adds RAID 5) for NVMe
Removable: HP DX175 removable HDD carrier; HP CRU certified M.2 modules 512 GB-4 TB
Optical: 9.5 mm slim DVD-ROM, SuperMulti DVD writer or BDXL Blu-ray writer
Boot drive: From Nov 2023 HP ships Windows only on an SSD; HDDs are data drives

Graphics

Integrated: None
Compute: NVIDIA A800 40 GB (no display outputs; needs a separate display card; 2 max)
Ultra high-end: NVIDIA RTX PRO 6000 Blackwell Max-Q 96 GB (3 max)
High-end: NVIDIA RTX 6000 Ada, RTX 5880 Ada, RTX PRO 5000 Blackwell, RTX 5000 Ada, RTX PRO 4500 Blackwell, RTX 4500 Ada, RTX PRO 4000 Blackwell, RTX 4000 Ada; AMD Radeon Pro W7900 (1 max); earlier: RTX A6000, RTX A5000, RTX A4500, RTX A4000, AMD Radeon Pro W6800
Mid-range: NVIDIA RTX PRO 2000 Blackwell, RTX 2000 Ada, RTX 2000E Ada; AMD Radeon Pro W7600; earlier: RTX A2000, T1000 8 GB, AMD Radeon Pro W7500, W6600, Radeon RX 6700 XT
Entry: NVIDIA RTX A1000, T1000 4 GB, RTX A400; AMD Radeon RX 6400 (1 max); Intel Arc Pro A40 (1 max); earlier: NVIDIA T400
Max cards: 3 for most cards; NVLink 3-slot bridge and Quadro Sync II / RTX PRO Sync offered
Required kits: Most cards (footnoted in QuickSpecs) need the Z6 Fan and Front Card Guide (56Q80AA); dual or triple high-end configurations also need the Z6 PCIe Retainer with Fans (56Q85AA). Cards marked note 6 (RTX 6000/5880/5000 Ada, RTX PRO 6000/5000/4500 Blackwell, RTX 4500 Ada, W7900) are only supported with the 1125 W or 1450 W PSU

Expansion

Slot 1: PCIe 5.0 x16 (x16 electrical), full height, full length
Slot 2: PCIe 4.0 x4 (x4 mechanical), full height, half length
Slot 3: PCIe 4.0 x4 (x4 mechanical), full height, half length
Slot 4: PCIe 4.0 x16 (x16 electrical), full height, full length
Slot 5: PCIe 4.0 x16 (x16 electrical), full height, full length
Slot 6: PCIe 3.0 x16 mechanical / x8 electrical, full height, full length
M.2: 2 × PCIe 4.0 x4 onboard
Other: 2 front NVMe SlimSAS PCIe 4.0 x8; onboard 10GbE link (PCIe 3.0 x4); Flex I/O module bay; optional HP Dual Thunderbolt 4 PCIe x4 low-profile card (340L1AA)

Networking

Onboard: 1 × 1GbE RJ-45, Intel I219-LM (AMT, DASH, PXE, WOL)
Optional onboard: 2 × 10GbE RJ-45 ports on the rear panel
Flex I/O options: HP Flex 10GbE, 2.5GbE, 1GbE, 1GbE fiber LC, Intel AX210 Wi-Fi 6 + BT 5.2
Cards: HP Dual Port 10GbE NIC G2, Intel X550 dual 10GbE, Intel I225 2.5GbE, Intel I350-T4, Intel E810-XXVDA2 10/25GbE, Intel E810-CQDA2 100GbE, NVIDIA Mellanox ConnectX-6 Dx 10/25GbE SFP28, Broadcom 5720, Allied Telesis AT-2911Ta/2 and AT-2914SX/LC, Intel AX210 Wi-Fi 6E + BT 5.2 (external antenna)

Power

775 W: 80 PLUS Gold (90% at 50% load), 100 V/15 A or 200 V/10 A; up to 230 W auxiliary graphics power
1125 W: 80 PLUS Gold, 110 V/15 A; up to 600 W auxiliary graphics power
1450 W: 80 PLUS Gold, 230 V/10 A; up to 900 W auxiliary graphics power
Input: 100-240 VAC rated (90-269 VAC operating), 50-60 Hz

Ports

Front (Premium): 2 × USB-C 20 Gbps (USB PD 3.0), 2 × USB-A 5 Gbps (1 charging), headset jack, optional SD reader
Front (Entry): 4 × USB-A 5 Gbps (1 charging), headset jack, optional SD reader
Rear: 6 × USB-A 5 Gbps, 1 × RJ-45 (plus 2 × 10GbE optional), audio in/out
Optional: Flex I/O module (serial, dual USB-A 3.2 Gen1, USB-C 3.2 Gen2, NICs, Wi-Fi), internal serial + PS/2 port, USB 2.0 Type-A adapter, dual Thunderbolt 4 card
Internal: 5 SATA, 1 USB 3.2 Gen1 header (SD reader), 1 single and 1 dual USB 2.0 header

Physical

Form factor: Tower (4U when racked)
Dimensions (H×W×D): 444.5 × 169 × 465 mm footprint (478 mm max depth)
Weight: Minimum 12.8 kg, typical 14.1 kg, maximum 24.3 kg
Operating temp: 5-40 °C
Rack: Z2 Mini/Z2 Tower/Z4/Z6 depth-adjustable fixed rail rack kit (2A8Y5AA)
Noise: 3.3 B idle (entry config) to 4.7 B active (high-end, 3 GPUs)

Management

vPro / AMT: Intel AMT 16.10 via I219-LM, DASH 1.2
Remote: HP Remote System Controller (PCIe or integrated), main-board adapter, Universal KVM version
Security: TPM 2.0 (Infineon SLB 9672), HP Sure Start, chassis intrusion sensor, optional solenoid hood lock, padlock loop and Kensington slot
BIOS: UEFI 2.7B, HP BIOS Configuration Utility, HP PC Hardware Diagnostics UEFI

Operating systems

Preinstalled: Windows 11 Pro for Workstations (or Windows 10 Pro for Workstations downgrade), Ubuntu 22.04 LTS, HP Linux-ready
Supported: Windows 11 23H2/24H2/25H2, RHEL Workstation 8 and 9, SUSE Linux Enterprise Desktop 15, Ubuntu 20.04/22.04 LTS; Windows 10/11 Enterprise web-supported
Not supported: Windows 7 and 8

Processors

Intel Xeon w9-3475X
Intel Xeon w7-3465X
Intel Xeon w7-3545
Intel Xeon w5-3535X
Intel Xeon w5-3435X
Intel Xeon w5-3525
Intel Xeon w5-3433
Intel Xeon w5-3425
Intel Xeon w5-3423
Intel Xeon w7-3455
Intel Xeon w7-3445