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Black tower workstation with DVD drive and front ports

HP

HP Z4 G4 CAD Workstation Xeon W-2135 3.7GHz 128GB DDR4 1TB NVMe Quadro P1000 Windows 11

SKU CH-HXS6-CN5SG

Tower workstation with a 6-core Xeon at 3.7 GHz, 128 GB DDR4, 1 TB NVMe and Quadro P1000 graphics for CAD and rendering

  • TypeTower
  • Redundant Hot-swap PowerNo
  • CPU TypeIntel Xeon
  • MAX Processors1
  • Chipset465W
  • Installed Memory Size128GB

Installed Memory Size 128GB

SSD (Installed) 1TB

HDD None

  • 6-core Xeon W-2135 at 3.7 GHz powers professional CAD and rendering
  • 128 GB DDR4 ECC memory handles large assemblies and multitasking
  • 1 TB NVMe storage gives fast access to project files
  • Quadro P1000 with 4 GB GDDR5 drives multi-display visual work
  • Windows 11 pre-installed for immediate out-of-box productivity

Built for professional CAD and rendering

The HP Z4 G4 tower workstation pairs a six-core Intel Xeon W-2135 processor running at 3.7 GHz with 128 GB of DDR4 ECC memory and an NVIDIA Quadro P1000 graphics card with 4 GB GDDR5. A 1 TB NVMe drive provides fast storage for project files. Windows 11 is preinstalled for immediate use.

Straightforward component access

The chassis offers eight DIMM slots and supports four-channel memory up to 2666 MHz. Two internal 3.5-inch bays with acoustic rails and two external 5.25-inch bays allow storage expansion. A dedicated slim optical bay and onboard SATA controller with RAID 0/1/5/10 simplify drive installation.

Sustained workload stability

The 465 W power supply and workstation-class thermal design maintain consistent performance during extended rendering or engineering tasks. ECC memory protects data integrity over long sessions. The Quadro P1000 drives up to four displays via Mini DisplayPort 1.4 for continuous multi-monitor workflows.

Highlights

  • 6-core Xeon W-2135 at 3.7 GHz powers professional CAD and rendering
  • 128 GB DDR4 ECC memory handles large assemblies and multitasking
  • 1 TB NVMe storage gives fast access to project files
  • Quadro P1000 with 4 GB GDDR5 drives multi-display visual work
  • Windows 11 pre-installed for immediate out-of-box productivity

Specifications

BrandHP
SeriesZ Series
ModelZ4 G4
TypeTower
Redundant Hot-swap PowerNo
CPU TypeIntel Xeon
MAX Processors1
Chipset465W
Installed Memory Size128GB
Memory TypeDDR4
Max Memory Capacity128GB
Memory FeaturesFour channel memory up to 2666MHz DDR4 ECC memory, 2 DIMMs per Channel, 8 DIMM Slots.
Number of Memory Slots8
SSD (Installed)1TB
Raid LevelRAID 0/1/5/10
Max HDD Capacity1
Media DrivesDVD +/- RW
GPU TypeNVIDIA Quadro P1000
Video Memory4GB
LAN Ports2 x Ports
Expansion SlotsSlot 1: PCI Express Gen3 x16 (from CPU), Slot 2: PCI Express Gen3 x4 (from PCH) with open-ended connector*, Slot 3: PCI Express Gen3 x16 (from CPU), Slot 4: PCI Express Gen3 x4 (from PCH) with open-ended connector*, Slot 5: PCI Express Gen3 x8 (from CPU) with open-ended
connector*, , and M.2 Slot 1: M.2 PCIe Gen 3 x4 (from CPU) up to 80mm storage devices
Operating SystemWindows 11 Pro
Weight45.0000LBS

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How can I verify the Intel Xeon W-2135 3.7GHz 6-core processor and 128GB DDR4 ECC memory are detected correctly after first boot?

Open Windows 11 Task Manager > Performance tab to confirm 6 cores, 12 logical processors at 3.70GHz base clock and 128GB DDR4 2666MHz ECC across the 8 DIMM slots; then run dxdiag to see the NVIDIA Quadro P1000 with 4GB GDDR5 and four Mini DP 1.4 outputs.

What ships inside the tower and which items must I source separately for a complete CAD setup?

The unit includes the Z4 G4 tower, Xeon W-2135 CPU, 128GB DDR4 ECC RAM (filling 8 slots), 1TB NVMe M.2 SSD, Quadro P1000 GPU, DVD±RW drive, Windows 11 licence and power cord; you must add monitors (Mini DP 1.4 cables), keyboard, mouse and any extra 3.5" or 5.25" drives.

Which memory configuration should I choose if I want room to reach the 512GB maximum later?

This build already populates all 8 DIMM slots with 128GB DDR4 2666MHz ECC; to expand toward 512GB you would need to replace the existing modules with higher-capacity DDR4 ECC DIMMs — no free slots remain.

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