Certified Refurbished HP ProDesk 400 G6 Small Form Factor Desktop

The HP ProDesk 400 G6 SFF features an Intel Core i5-9500 processor running at 3.00 GHz (turbo boost to 4.4 GHz), 8GB DDR4 RAM, and a fast 256GB NVMe SSD. This professionally restored desktop delivers reliable performance for business environments, office multitasking, and everyday computing—which means you can run Microsoft Office, web browsers with 15+ tabs, and video conferencing simultaneously without slowdowns. The hex-core processor provides smooth multitasking because its six cores handle concurrent tasks efficiently, therefore making it ideal for professionals managing spreadsheets, email, and cloud applications at once. The NVMe SSD boots Windows 11 in approximately 10-15 seconds compared to 45+ seconds with traditional hard drives, eliminating the most common performance bottleneck in office environments.

Ideal For

This desktop suits specific professional and home scenarios:

• Office professionals managing accounting software, CRM platforms, and multiple documents simultaneously with Microsoft Teams or Zoom running in the background
• Small business workstations where staff need reliable access to cloud services, email, invoicing software, and customer databases throughout the workday
• Home office users conducting video conferences, creating presentations, and accessing shared network drives with consistent performance
• Educational institutions requiring compact, dependable computers for administrative tasks, student record management, and digital classroom support

Key Features & Benefits

• Intel Core i5-9500 Hex-Core Processor: Six cores deliver smooth multitasking for office applications—in our testing, systems handle 20+ browser tabs, Teams calls, and Office applications without lag
• 256GB NVMe SSD Storage: Sequential read speeds up to 3,000 MB/s mean applications launch instantly and file transfers complete in seconds rather than minutes, directly improving workflow efficiency
• 8GB DDR4-2666 RAM: Sufficient memory for typical business workloads including Microsoft 365, web applications, and PDF editing—adequate for environments running 5-8 applications concurrently
• Intel UHD Graphics 630: Handles dual-monitor setups smoothly via DisplayPort and VGA connections, supporting 4K video playback for presentations and streaming content
• DVD/RW Drive: Increasingly rare in modern desktops—useful for accessing legacy software installations, playing physical media, or archiving documents to optical discs
• Space-Saving Design: Small Form Factor measures just 27.0 x 29.6 x 9.5 cm, fitting under desks or in compact workspaces while delivering full desktop performance
• Windows 11 Pro: Includes BitLocker encryption, Remote Desktop capability, and enhanced security features essential for business environments requiring data protection

Common Questions

Can it handle video calls while multitasking?
Yes—our technicians routinely test these systems running Microsoft Teams or Zoom simultaneously with Office applications and 10+ browser tabs. The i5-9500's six cores and 8GB RAM handle this scenario comfortably, though closing unnecessary background applications maximises performance during calls.

How does the NVMe SSD improve everyday use?
The 256GB NVMe drive reads data at approximately 3,000 MB/s compared to 80-160 MB/s for traditional hard drives. In practical terms, Windows boots in 10-15 seconds, Excel files with 50,000+ rows open instantly, and software installations complete 5-6 times faster—eliminating the frustrating wait times associated with older storage technology.

Is 8GB RAM sufficient for business use in 2026?
For typical office workflows involving Microsoft 365, web browsers, PDF editing, and video calls, 8GB remains adequate. However, users regularly working with large datasets, virtual machines, or design software should consider upgrading to 16GB through the system's accessible DIMM slots.

Technical Specifications

At a Glance:

• Type: Small Form Factor Desktop (27.0 x 29.6 x 9.5 cm)
• Processor: Intel Core i5-9500 (6 cores, 3.0 GHz base / 4.4 GHz turbo, 9MB cache, 65W TDP)
• Memory: 8GB DDR4-2666 RAM (dual-channel capable, expandable to 64GB)
• Storage: 256GB NVMe SSD (M.2 2280 PCIe interface delivering ~3,000 MB/s read speeds)
• Graphics: Intel UHD Graphics 630 (integrated, supports 4K displays)
• Optical Drive: DVD/RW (reads and writes CDs and DVDs)
• Operating System: Windows 11 Pro (includes business security and management features)
• Connectivity: 6 x USB ports (2 x USB 3.1 front, 2 x USB 3.1 + 4 x USB 2.0 rear), DisplayPort 1.2, VGA, Gigabit Ethernet, audio jacks
• Weight: 4.6 kg
• Best use: Office productivity, business applications, web-based workflows, video conferencing, dual-monitor setups
• Not recommended for: Modern gaming, 4K video editing, 3D rendering (integrated graphics limit intensive visual tasks)

Performance & Real-World Use

After testing 500+ refurbished business desktops, the ProDesk 400 G6 with i5-9500 configuration delivers the most consistent performance-per-dollar under $600 for office environments. The processor scores approximately 1,505 points in single-core and 5,423 points in multi-core Geekbench 6 tests—sufficient for mainstream business computing. In typical scenarios, users experience smooth performance when switching between Outlook, Excel spreadsheets with moderate datasets, Chrome with 15 tabs, and Teams video calls. The NVMe storage eliminates the primary bottleneck found in older systems with mechanical hard drives, directly improving responsiveness when opening applications or accessing files. However, the 8GB RAM configuration reaches capacity when running memory-intensive applications like Photoshop or large virtual machines—in these scenarios, closing background applications or upgrading to 16GB becomes necessary.

Operating System: Windows 11 Pro

Pros: Windows 11 Pro includes BitLocker drive encryption for data protection, Remote Desktop for accessing the system remotely, Group Policy management for IT administrators, and Microsoft Defender for comprehensive malware protection. The interface includes productivity enhancements like Snap Layouts for organising multiple windows and Virtual Desktops for separating work contexts. Security updates continue through October 2025 at minimum, with extended support expected beyond. Cons: Some users accustomed to Windows 10 require adjustment to the centred taskbar layout (though customisable), and certain legacy peripherals may require updated drivers. The system meets Windows 11 hardware requirements including TPM 2.0 for enhanced security.

Cosmetic Condition Guide

Excellent Grade: Desktop units show minimal signs of use—light surface scratches on external casing that require close inspection to notice. No deep scratches, cracks, paint chips, or broken components. These systems appear well-maintained and suitable for client-facing environments. Good Grade: Fully functional units with more visible wear including light scratches, minor scuffs on external surfaces, and potentially small dings or dents on case panels. May feature slightly more extensive housing wear than Excellent grade. All cosmetic variations are external only—internal components and performance remain unaffected.

Verified Reboot Refurb Quality Assurance

Every HP ProDesk 400 G6 earns Verified Reboot Refurb certification through comprehensive testing procedures. We test all features including processor performance under load, memory integrity, storage read/write speeds, graphics output, network connectivity, USB ports, audio functionality, and optical drive operation through a 40+ point inspection including 4+ hours of stress testing. Our technicians run SMART diagnostics on storage drives, verify BIOS settings, confirm proper thermal management, and ensure Windows 11 Pro activates correctly. As an industry expert since 2001, Reboot IT uses cutting-edge diagnostic software to guarantee each system meets our quality standards before earning the Verified Refurb designation—our commitment to delivering business-grade reliability.

Warranty & Support

This certified refurbished desktop is sold by Reboot IT and includes a 1-year warranty for your complete peace of mind. Our warranty covers hardware defects and functional failures, providing Australian-based support from technicians familiar with refurbished business systems.

Smart Business Computing

This HP ProDesk 400 G6 configuration suits organisations and individuals requiring dependable multitasking without premium pricing, backed by Reboot IT's 1-year warranty and 20+ years refurbishment expertise in the Australian market.