Please allow ~4-6 weeks to dispatch from Australia for quality control. Only 4 devices per customer may be shipped each day, so orders placed for more than 4 devices will be shipped over multiple days.
Products containing Lithium-Ion batteries (laptops and smartphones) are subject to extra safety requirements and are experiencing further delays.
If you are ordering a device that does not include a Windows 11 licence as standard, please check Microsoft's minimum system requirements to confirm if it can be upgraded later should you wish to do so.
Product images are for illustrative purposes only and may contain AI-generated content. They do not represent the exact product that is subject to the cosmetic grading policy detailed here.


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Professional-grade small form factor desktop computer featuring 6th generation Intel Core i3 dual-core processor, 8GB DDR4 memory, and 500GB storage. Originally designed for business environments, this HP ProDesk 400 G3 delivers reliable performance for office productivity, web browsing, and essential computing tasks. Thoroughly refurbished and tested by certified technicians, backed by a comprehensive 12-month warranty from Reboot IT.
What Makes the HP ProDesk 400 G3 a Reliable Desktop Choice?
- 6th Generation Intel Core i3-6320 Processor: Dual-core CPU with 4 threads running at 3.9GHz base frequency provides responsive performance for multitasking, office applications, and web-based productivity tools with Intel HD Graphics 530 integrated.
- 8GB DDR4 Memory Configuration: Ample system memory for smooth operation of Windows 10, multiple browser tabs, Microsoft Office suite, and background applications without performance bottlenecks during typical business workflows.
- Space-Efficient Small Form Factor Design: Compact desktop footprint maximises desk space while maintaining full desktop functionality, ideal for modern office environments where space optimisation is essential.
- Enterprise-Grade Build Quality: Originally deployed in corporate environments, built to withstand continuous daily operation with HP's rigorous 120,000-hour Total Test Process ensuring long-term reliability and durability.
- Advanced Security Features: HP BIOSphere technology provides hardware-level security with boot verification, customizable authentication, and BIOS-level password protection to safeguard critical business data and system integrity.
- Professional Refurbishment Process: Completely restored by Reboot IT's certified technicians with comprehensive testing of all components, ensuring like-new performance and reliability standards.
How Does the HP ProDesk 400 G3 Perform in Daily Business Use?
The HP ProDesk 400 G3 excels in typical office environments where reliable, consistent performance matters more than cutting-edge specifications. The Intel i3-6320 processor handles multiple office applications simultaneously—you can run Microsoft Office suite, maintain 8-12 browser tabs, stream video content, and manage email clients without noticeable slowdowns. The 8GB DDR4 memory ensures smooth multitasking, while the integrated Intel HD Graphics 530 supports dual monitor setups for enhanced productivity.
For small businesses, home offices, and educational settings, this desktop provides the processing power needed for accounting software, customer relationship management systems, and cloud-based applications. The small form factor design makes it particularly suitable for reception areas, compact workstations, or anywhere desk space is at a premium. Boot times and application loading are responsive thanks to the optimised hardware configuration.
While this system isn't designed for intensive tasks like video editing or 3D rendering, it delivers exactly what most users need: dependable performance for productivity software, internet browsing, document creation, and communication tools. The enterprise-grade components ensure consistent operation even during extended work sessions.
Complete Technical Specifications
| Processor | Intel Core i3-6320 (6th Generation Skylake) - 3.9GHz base frequency, 4MB cache, 2 cores, 4 threads, 14nm process |
| Memory (RAM) | 8GB DDR4-2133 SDRAM (configuration may vary - single or dual channel) |
| Storage | 500GB SATA 7200 RPM hard disk drive |
| Graphics | Intel HD Graphics 530 (integrated) - supports DirectX 12, OpenGL 4.4, up to 1.05GHz dynamic frequency |
| Chassis Type | Small Form Factor (SFF) - horizontal or vertical placement |
| Motherboard | HP proprietary with Intel B150 chipset |
| Expansion Slots | 1x PCIe 3.0 x16, 1x PCIe 3.0 x1, 2x half-height slots |
| USB Ports | 6x USB 3.0 ports (4 rear, 2 front), 4x USB 2.0 ports (rear) |
| Video Output | 1x VGA (D-Sub), 1x DisplayPort 1.2 |
| Audio | Integrated Realtek ALC221 - line in/out, headphone/microphone combo jack |
| Network | Integrated Realtek Gigabit Ethernet (10/100/1000) |
| Wireless | Not included (PCIe slot available for wireless card upgrade) |
| Power Supply | 180W 85% efficiency external power adapter |
| Dimensions | 270 x 95 x 303 mm (W x H x D) |
| Weight | Approximately 4.2 kg |
| Security | HP BIOSphere, TPM 2.0, chassis intrusion detection, Kensington lock slot |
| Operating System | No OS included - Windows 10 compatible, Windows 11 may require workarounds |
| Warranty | 12-month comprehensive warranty by Reboot IT |
Is the HP ProDesk 400 G3 Right for Your Needs?
|
✓ Best For: • Office productivity and administrative tasks • Small business point-of-sale systems • Educational computer labs and classrooms • Home office setups with space constraints • Budget-conscious buyers needing reliable performance |
✗ Not Recommended For: • Gaming beyond basic/casual titles • Video editing and content creation • CAD design and 3D rendering applications • Resource-intensive scientific computing • Users requiring latest Windows 11 features |
Understanding Condition Grades and Battery Health
Since this is a desktop computer, battery considerations don't apply, but understanding our condition grading system helps you make an informed purchase decision. All HP ProDesk 400 G3 units undergo the same rigorous refurbishment process regardless of cosmetic grade, ensuring identical performance and reliability across all tiers.
| A — Excellent | Minimal wear, no visible scratches or dents | Full functionality, all ports and features tested |
| B — Good | Light usage marks, minor cosmetic imperfections | Full functionality, all ports and features tested |
| C — Fair | Visible wear consistent with business use | Full functionality, all ports and features tested |
Every desktop computer receives comprehensive component testing including hard drive health verification, memory diagnostics, and thermal performance validation to ensure reliable operation.
Frequently Asked Questions About the HP ProDesk 400 G3
What warranty is included with this HP ProDesk 400 G3?
Every refurbished HP ProDesk 400 G3 includes a comprehensive 12-month warranty provided by Reboot IT, covering all hardware components and ensuring peace of mind with your purchase.
Can this desktop run Windows 11?
While the i3-6320 doesn't officially meet Windows 11's CPU requirements, it may run Windows 11 with workarounds. Windows 10 remains the recommended and fully supported operating system for optimal performance.
How many monitors can I connect simultaneously?
The HP ProDesk 400 G3 supports dual monitor setup using the VGA and DisplayPort outputs simultaneously, allowing extended desktop configurations for enhanced productivity.
Is wireless connectivity included?
Wireless capabilities are not built-in, but the system includes Gigabit Ethernet for wired network connections. A PCIe wireless card can be added if WiFi connectivity is required.
What's the maximum memory this system supports?
The HP ProDesk 400 G3 supports up to 32GB DDR4 memory across two DIMM slots, allowing significant memory expansion for users with demanding applications.
How has this desktop been refurbished?
Each unit undergoes Reboot IT's comprehensive refurbishment process including component testing, cleaning, software restoration, and quality verification by certified technicians before shipment.
Warranty and After-Sales Support
Your HP ProDesk 400 G3 desktop is protected by a comprehensive 12-month warranty provided directly by Reboot IT. This warranty covers all hardware components including the processor, memory, storage, motherboard, and power supply against manufacturing defects and component failure.
Our warranty includes technical support, repair services, and component replacement when necessary. Claims are processed efficiently through our established service network, ensuring minimal downtime for your business operations. This coverage reflects our confidence in the thorough refurbishment process and quality standards applied to every desktop computer.
As Australia's trusted refurbishment specialist since 2001, Reboot IT provides reliable after-sales support backed by extensive experience in enterprise-grade computer restoration and customer service excellence.
Upgradeability and Compatibility Options
The HP ProDesk 400 G3 offers several upgrade pathways to extend its useful life. Memory can be expanded up to 32GB using standard DDR4-2133 SO-DIMMs across two available slots. The 500GB hard drive can be replaced with a faster SSD for improved boot times and application responsiveness. The PCIe x16 slot accommodates low-profile graphics cards for users requiring enhanced display capabilities.
Additional expansion options include PCIe wireless cards for WiFi connectivity and optical drives via the available drive bay. The system's tool-free chassis design simplifies component access for user-serviceable upgrades. While Windows 10 remains the optimal operating system, the hardware supports various Linux distributions for users seeking alternative platforms.
| Manufacturer Warranty | 3 Months |
| Features | Built-In Speakers |
| Item Height | 269.24mm |
| RAM Size | 8GB |
| Graphics Processing Type | Integrated/On-Board Graphics |
| Chipset | H110 |
| Item Width | 93.98mm |
| Condition | A |
| Model | Prodesk 400 G3 |
| Type | Desktop |
| Resolution | none |
| Processor | Intel Core i3 6th Gen. |
| Release Date | Q3'15 |
| Processor Model | 6320 |
| Colour | None |
| Item Weight | 4.45kgs |
| Storage Type | HDD (Hard Disk Drive) |
| Optical Drive | None |
| Operating System Edition | None |
| SSD Capacity | NONE |
| Memory Type | DDR4 DIMM |
| Cores | 2 |
| Other Software | Free Anitvirus,Open Office |
| Brand | HP |
| L2 Cache | 4 MB |
| Form Factor | Small Form Factor (SFF) |
| Part Number | N4P96AV |
| Screen Size | None |
| Maximum Ram Capacity | 16 GB |
| Custom Bundle | No |
| Motherboard Model | None |
| Series | HP ProDesk |
| Operating System | None |
| RAM Type | DDR4 DIMM |
| Most Suitable For | Casual Computing,Office |
| Connectivity | USB 2.0,USB 3.0,DisplayPort,VGA |
| Max Turbo Speed | 3.90 GHz |
| MPN | None |
| Processor Speed | 3.90GHz |
| Release Year | 2015 |
| Hard Drive Capacity | 500GB |
| GPU | INTEL HD 530 GRAPHICS |
| Item Length | 299.72mm |
| Audio Output | Integrated |
| Webcam | No |
| Bundle Description | None |
Refurbished Computers - Cosmetic Grading Guide
Our supplier's refurbished hardware is typically graded either "Excellent" or "Good", however, some legacy products were graded under a letter grading system (A, B, C). Please find the definitions for each grade below and contact us if you're uncertain of a device's grade.
Used Smartphone / Refurbished Mobile Phones
"Excellent" Grade
Devices in this category appear like new, with very minor wear. Expect light or fine scratches on the screen that are shallow enough not to catch on a fingernail. The edge around the glass is virtually flawless, save for possible light scratching around the power port. The back plate may show light/fine scratches, including on the Apple logo, with any discoloration being minimal.
"Good" Grade
These devices are characterized by being fully tested and functional even if they have body scratches, minor paint chips, or a small hairline crack on the screen. Screens are free from dead pixels but may exhibit slight scratching from moderate use.
Refurbished Desktops, Laptops and Monitors
"Excellent" Grade - Laptops
Reserved for units that show barely any signs of previous use, these laptops may exhibit very minor scuffing or abrasions, associated only with minimal standard use. The keyboards show light wear, and importantly, the screens are pristine, free from any scratches, cracks, chips, dead pixels, dark spots, discoloration, or blemishes.
"Excellent" Grade - Desktops
Desktop PCs in the "Excellent" grade category are free from deep scratches, cracks, paint chips, or any broken/missing pieces, ensuring a sleek and almost-new aesthetic.
"Excellent" Grade - Monitors
"Excellent" grade is reserved for units that show evidence of very little to no previous use. Any wear on an "Excellent" Display, including housing/frame and/or external surfaces (i.e. Frame) is associated with standard minimal use. "Excellent" units may have minor scuffing and / or minor abrasions on plastics with from standard light previous use."Excellent" Displays will feature no scratches, cracks, chips, dead pixels, dark spots, discoloration or blemishes. Units will only feature the standard minimal wear and tear that is associated with a used unit.
"Good" Grade - Laptops
"Good" laptops may feature one or several small dings or dents on covers and / or small paint chips on the surface or small hairline cracks in the bezel. Laptop screens may feature uneven light diffusion in screen and may feature subtle blemishes. "Good" Laptops will not feature cracks screens but may feature slight scratching, dead pixels or white spots on the screen.
"Good" Grade - Desktops
"Good" grade desktops may have light scratches on external body and may feature more excessive unit housing and/or external case wear than "Excellent" units, including wear on case / lid. "Good" PCs may feature one or several small dings or dents on covers and / or small paint chips on the surface.
"Good" Grade - Monitors
Displays in the "Good" grade have been fully tested and are functional but may include scratches on body, small paint chips, minor cracks on body, loose and/or wobbly bases. "Good" Display screens may feature uneven light diffusion in screen and may feature subtle to moderate blemishes. "Good" Displays will not feature cracks on screens but may feature slight scratching on screen surfaces from moderate use or wear, dead pixels or white spots on the screen.
Legacy letter grading
Used Smartphone / Refurbished Mobile Phones
A Grade
- No chips, scratches or cracks on the front glass and housing
- No missing or alternative parts
- No sign of liquid damage
- Battery cannot be swollen
B Grade – Same as A Grade except:
- May have light scuffs but no chips or cracks
- Light scratches on housing or front glass
C-Grade – Same as B Grade except:
- Unlimited long shallow scratches on the front glass
- No chips or cracks on the front glass
- Unlimited scratches, chips/dents on back cover housing and corners
- Minor cracks allowed
- Customized housing and aftermarket covers allowed
Refurbished Desktops, Laptops and Monitors
A-Grade
- Overall excellent to very good cosmetic condition. Some may be pristine, others may have light scratches or minor blemishes
- Laptops may have some shiny areas around the keyboard such as the space bar, touchpad or touchpad buttons
- Keyboard keys will be in excellent condition
- Laptop and monitor screens will be blemish free
- Cosmetic blemishes will not impact the overall functionality or performance of the device
B-Grade
- Will have some cosmetic blemishes that include scratches and/or other imperfections
- Minor scratches and dents on the housing
- Laptops may have shiny keys or shiny surfaces around the keyboard however all characters will be legible
- Laptop and monitors screens will have imperfections such as minor scratches, minor chips and/or white spots. There will be no cracking on the screen
- Have the same warranty as A Grade
- Pricing will be cheaper than A Grade
C-Grade
- Same as B-Grade except may have unlimited scratches/blemishes on the screen
- May have cracks/chips or dents on the housing
- Have the same warranty as A Grade
- Pricing will be cheaper than B Grade










