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Black mid-tower workstation chassis, tool-less side panel, front I/O and power button

HP

HP Z4 G4 Business Desktop Xeon W-2225 4.1GHz 256GB DDR4 500GB NVMe RTX 4000 8GB Windows 11 Pro

SKU CH-GTEQ-95RFY

Mid-tower workstation with Xeon W-2225 4.1GHz, 256GB DDR4 ECC memory, 500GB NVMe SSD and Quadro RTX 4000 8GB graphics for professional workloads

  • Screen sizeNo Screen
  • ProcessorIntel Xeon
  • RAM capacity256 GB DDR4
  • SSD storage500 GB pcie
  • GraphicsNVIDIA Quadro RTX 4000
  • Operating systemWindows 11 Pro
  • Intel Xeon W-2225 4-core CPU reaches 4.6 GHz turbo for fast single-thread speed
  • 256 GB DDR4 2933 ECC memory handles large datasets with error correction
  • 500 GB NVMe SSD provides rapid boot and project load times
  • NVIDIA Quadro RTX 4000 8 GB GDDR6 drives certified 3D CAD and rendering workflows
  • 1000 W 80 Plus Gold PSU delivers 90 % efficient power for stable operation

Single-Processor Xeon Workstation

The HP Z4 G4 is a new mid-tower business desktop built around an Intel Xeon W-2225 4-core processor running at 4.1 GHz with a 4.6 GHz turbo frequency. It ships with 256 GB of DDR4 2933 ECC registered memory across eight 32 GB modules and a 500 GB PCIe NVMe solid-state drive. An Nvidia Quadro RTX 4000 graphics card with 8 GB GDDR6 memory and three DisplayPort 1.4 outputs plus one USB-C connector drives professional visual workloads. Windows 11 Pro 64-bit is pre-installed and digitally activated.

1000W Gold PSU Thermal Envelope

A 1000 W 80 Plus Gold power supply rated at 90 percent efficiency delivers power to the CPU, memory, storage and GPU under sustained load. The mid-tower chassis uses toolless access for serviceability while the single-processor design keeps the thermal envelope predictable for typical workstation tasks. Integrated Gigabit Ethernet and high-definition audio handle networking and sound without add-in cards.

512GB Memory Ceiling & ISV Certification

The platform supports a maximum of 512 GB of DDR4 2933 ECC memory, allowing future expansion beyond the factory 256 GB configuration. Multiple PCIe slots and additional internal bays accept SATA and NVMe drives for storage growth. The system carries ISV certification with leading professional applications, meaning the hardware and driver stack are validated for stable operation in 3D CAD, rendering, visualization and GPU-accelerated workflows.

How it compares

Measured against everything we stock in Business & Office Desktops, at today’s prices. Recalculated every night.

Price $2,753.99
Cheaper than about 64% of the 2,161 comparable items (median $5,687.99).
RAM capacity 256 GB DDR4
Higher than about 90% of the 2,095 comparable items (median 64 GB).
SSD storage 500 GB pcie
Lower than about 90% of the 2,058 comparable items (median 2 TB).

Specifications

Product
Product lineZ4
Model nameG4
Product typeBusiness Desktops & Workstations
Recommended useBusiness
Product colorBlack
Processor
ProcessorIntel Xeon
CPU socketLGA 2066
Memory
RAM capacity256 GB DDR4
RAM type and speedDDR4 2933
Max supported RAM512 GB
Storage
SSD storage500 GB pcie
Display
Screen sizeNo Screen
Graphics
GraphicsNVIDIA Quadro RTX 4000
Size & build
Form factorMid Tower
In the box
Included monitorNot included
Software
Operating systemWindows 11 Pro

Questions about this item

How do I install the eight 32GB DDR4 2933 ECC modules and what step is often missed?

Populate all eight DIMM slots in the labelled channel order, then enable ECC in the BIOS; skipping the BIOS step leaves error correction inactive.

Which component will need replacement first — the 1000W 80 Plus Gold PSU or the Quadro RTX 4000 GPU?

The 1000W 80 Plus Gold power supply typically reaches its rated lifespan before the Quadro RTX 4000 under continuous professional workloads.

What thermal limit appears first on the Xeon W-2225 during sustained 4.6GHz Turbo loads?

The CPU hits its thermal throttle point before the 1000W PSU or GPU reach their limits.

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