HP Z4 G4 Workstation Xeon W-2235 128GB DDR4 1TB NVMe RTX 4000 8GB

Single-Processor Workstation

The HP Z4 G4 is a mid-tower business desktop built around a single Intel Xeon W-2235 processor running at 3.8GHz with a 4.6GHz turbo frequency across six cores. It ships with 128GB of DDR4 2933 ECC registered memory installed as four 32GB modules and a 1TB PCIe NVMe solid-state drive. An Nvidia Quadro RTX 4000 graphics card with 8GB of GDDR6 memory provides three DisplayPort 1.4 outputs and one USB-C connector. A 1000W 80 Plus Gold power supply and Windows 11 Pro complete the configuration.

Targeted Professional Users

This workstation suits engineers, designers and analysts who rely on ISV-certified stability for CAD, rendering, visualization or GPU-accelerated compute workflows and who benefit from ECC memory protection. The 128GB starting capacity handles large datasets immediately, while the 512GB maximum supported memory allows future expansion within the four DIMM slots. Buyers who need more capacity than 512GB or who require dual-processor throughput should look at a different platform.

Decisive Specification

The LGA 2066 socket defines which Xeon W-series processors can be installed, limiting upgrades to that specific Intel generation and core-count range. The motherboard supports DDR4 2933 ECC registered DIMMs up to 512GB total, so memory expansion must use compatible registered modules rather than unbuffered alternatives. The Quadro RTX 4000 occupies one PCIe slot and draws power from the 1000W supply, leaving remaining slots available for additional storage or I/O cards.