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Before you believe a bad review about us

We would like to respond openly to every negative review about us. Many are posted anonymously, so we cannot reach those customers directly. This open letter is our reply, and we would be grateful if you took a moment to read it.

But here is what a one-star review will never tell you:

  • We import from 70+ official distributors. That is why you pay far less than local retail — and why delivery takes longer. We publish the date before you pay, never after.
  • You can pay only when your goods land in Johannesburg. Pay on Arrival, no full payment up front. Ask yourself what scammer offers that.
  • Nobody has ever lost money with us. You get the product, or you get a refund. There is no third option, and there never has been.
  • We are part of the ITwork group — ten years trading in Europe, nine stores, thousands of positive reviews.
  • Johannesburg and Cape Town stores open this year — real shelves, real stock, walk in and buy the same day.

We are not satisfied with our review scores, and we are not going to fix them by hiding anything. We are fixing them by being faster, clearer and easier to reach than any reason to complain.

Read the full letter — photos and video of real shipments, and a straight answer to every accusation.

Problem with an order right now? Write to [email protected], [email protected] or [email protected] — answered the same business day. The letter also lists our group and store owners' contacts.
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Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro

Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
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R119,712
+R467 Reward
Power-up to next level pro performanceThis high performance desktop workstation does it all. Tackle advanced workflows—from rendering and simulation to advanced video editing and massive dataset preparation. The Z4 AI workstation accelerates workflows across a wide range of professional apps and pro... Read More
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Stock 3 Code 123798 Brand HP Model 5E8X4EA Warranty 2 Years

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Estimated delivery Wednesday, October 7
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Power-up to next level pro performance
This high performance desktop workstation does it all. Tackle advanced workflows—from rendering and simulation to advanced video editing and massive dataset preparation. The Z4 AI workstation accelerates workflows across a wide range of professional apps and provides room to expand as work evolves.

Windows 11

Work anywhere without compromising on performance or security with Windows 11 powered by HP's collaboration and connectivity technology.

Intel® Xeon® W processor

Get optimized performance whether your professional application utilizes high core count or high frequency with the Intel® Xeon® W processor.[1]

Professional Grade Graphics

Tackle advanced video editing, machine learning and simulation projects

Ultra Fast Memory Configurations

Accelerate your workflow. Power through memory-intensive workloads with fast rendering, simulation, machine learning and video editing performance.

Professional performance. Extraordinary expandability.

Master intense workflows with up to 2 high-end professional GPUs, 26 cores[1] in a next-gen Intel® Xeon® W processor, and 512 GB of memoryq[2]. Easily expand as work evolves with tool-less access, 5 PCIe slots, and 2 front accessible NVMe bays.[3]

Engineered to stay cool and quiet.

Push your desktop workstation without disruptive noise. Smart fan control keeps the system whisper-quiet by tuning fan speeds in real-time using over 20 temperature sensors. Precisely placed vents and ducts streamline airflow and heat removal.

Ignite AI innovation

Accelerate AI development and inferencing with the Z4 AI workstation, with up to 2 NVIDIA RTX™ 6000 Ada Generation GPUs[4] delivering up to 2,914 AI TOPS for advanced AI. Process proprietary data securely on a local workstation to gain insights faster.

Designed with the planet in mind.

At HP, we care about the impact our products have on our people, communities, and planet. That’s why the Z4 contains 40% recycled plastics,[5] 10% recycled metal, 100% sustainably sourced outer box packaging, and is EPEAT® Gold Climate+ registered.[6,7]

How to use

Place the HP Z4 G5 on a stable surface with adequate ventilation and connect power and peripherals. Install or configure professional applications (CAD, DCC, simulation or data analysis software) on Windows 11 Pro and adjust GPU/driver settings according to vendor recommendations. For large projects, allocate sufficient RAM and use the SSD for project files to reduce load times and improve responsiveness.

Recommendations

Use up-to-date certified drivers for the NVIDIA Quadro RTX 4000 and follow HP maintenance guidelines. Ensure adequate cooling and a clean environment; consider periodic backups of project data to external storage or network locations.

Key Highlights
  • 3D rendering and ray tracing
  • CAD, CAM and engineering simulations
  • Advanced video editing and color grading
  • Large dataset preparation and analysis
  • Scientific computing and visualization
  • Processor family: Intel Xeon W (model w3-2535, 3.5 GHz base, up to 4.4 GHz boost)
  • Memory: 64 GB DDR5-SDRAM
  • Storage: 1 TB SSD
  • Graphics: NVIDIA Quadro RTX 4000 with 20 GB dedicated memory
  • Operating system: Windows 11 Pro
  • Power supply: 1125 W
  • Weight: 10.5 kg
  • Color: Black
Specifications
Cable lock slot
Yes
Cable lock slot type
Kensington
Carbon emissions, end-of-life (kg of CO2e)
2
Carbon emissions, logistics (kg of CO2e)
5
Carbon emissions, manufacturing (kg of CO2e)
290
Chassis type
Tower
Country of origin
Czech Republic
Depth
444.5 mm
Discrete GPU manufacturer
NVIDIA
Discrete graphics card
Yes
Discrete graphics card memory
20 GB
Discrete graphics card model
NVIDIA RTX 4000 Ada
Discrete graphics memory type
GDDR6
ECC
Yes
Ethernet LAN
Yes
General Product Safety Regulation (GPSR) URL
https://support.hp.com/us-en/document/ish_6126692-6126777-16?openCLC=true https://kaas.hpcloud.hp.com/pdf-public/pdf_6303729_en-US-1.pdf
Height
168.9 mm
HP Artificial Intelligence
AI Workstation
HP GTIN (EAN/UPC)
821844085974
HP Management tools
HP Driver Packs; HP System Software Manager (download); HP BIOS Configuration Utility (download); HP Smart Support
HP Security tools
Full volume encryption; HP Secure Erase; Kensington lock slot; Secure authentication; TPM 2.0 certified; HP BIOSphere; HP Sure Run; HP Sure Click; HP Sure Sense; HP Sure Admin; HP Platform Certificate; HP Sure Start; HP Sure Recover; Self-Encrypted Drives
HP segment
Business
HP Support Assistant
Yes
Input device model
HP Wired 320M Mouse
Intel® Turbo Boost Technology
Yes
Internal memory
64 GB
Internal memory type
DDR5-SDRAM
Keyboard connectivity
Wired
Keyboard included
Yes
Line-in
Yes
Low halogen
Yes
Manufacturer warranty
1 year (1/1/1) limited warranty includes 1 year of parts, labor and on-site repair. Terms and conditions vary by country. Certain restrictions and exclusions apply.
Market positioning
Performance
Memory clock speed
4800 MHz
Memory layout (slots x size)
2 x 32 GB
Memory slots
8x DIMM
Microphone in
Yes
Motherboard chipset
Intel W790
Number of 3.5" bays
4
Number of discrete graphics cards
1
Number of storage drives installed
1
Operating system installed
Windows 11 Pro
Optical drive type
DVD±RW
Package depth
572 mm
Package height
563 mm
Package width
314 mm
Password protection
Yes
Password protection type
BIOS, Power on
PCI Express x16 (Gen 4.x) slots
2
PCI Express x16 (Gen 5.x) slots
1
Processor boost frequency
4.4 GHz
Processor cache
22.5 MB
Processor cache type
L3
Processor cores
10
Processor manufacturer
Intel
Processor model
W3-2535
Processor threads
20
Product type
Workstation
Sustainability certificates
EPEAT, TCO
Total carbon emissions, w/o use phase (kg of CO2e)
309
Total carbon footprint (kg of CO2e)
610
Trusted Platform Module (TPM)
Yes
Trusted Platform Module (TPM) version
2.0
UNSPSC-code
43211515
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
6
USB 3.2 Gen 2x2 Type-C ports quantity
2
USB Power Delivery (USB PD)
Yes
Width
168.9 mm

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Price history over the last 6 months
Workstation HP Z4 G5 Intel Xeon W3-2535 64GB 1TB SSD NVIDIA Quadro RTX 4000 Windows 11 Pro
Current
R119,712
Lowest
R86,431
Highest
R157,789
Change 24H
+R5,751   +5%
Week
+R6,810   +6%
Month
+R5,954   +5%

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