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HP HP ProDesk 400 G4HP ProDesk 400 G4 USDT Small Desktop PC i5-8500T 8GB 256GB SSD Win 11 Pro

Excellent Grade · Fully tested · No visible marks
SKU: R-4518-EXC
4.74
★★★★★
715 reviews
12mo
Warranty
30day
Free returns
40+
Tech-tested checks
✓ Free AU shipping ✓ Pickup: Springvale VIC
Select Option
$259.00 $299.00

You save $40

or 4 interest-free payments of $64.75 with

Customize and Upgrade Your Device

Perks you get with every purchase

Warranty
If your item experiences a technical issue, we've got you covered—we'll either repair it or replace it for you!

30 days to change your mind
Feel free to return your item for any reason within the first 30 days of receiving it. It's that easy!

Free express shipping
Enjoy fast, free express shipping on all small items like laptops, tablets, and smartphones!

Customer support
Rest assured, we’ll always respond to you within 1 business day!

Frequently asked questions

What does the warranty cover?

Our warranty covers all hardware faults, but please note it doesn’t cover accidental damage or software issues. However, we’re here to help with technical support for those matters!

What is a refurbished device?

A refurbished device is a pre-owned item that has been restored to meet high-quality standards. At Reboot IT, we adhere to strict quality guidelines, ensuring that our refurbished products are not the same as used or secondhand items. We meticulously clean, test, and assess each device, replacing worn parts with high-quality components.

Unlike used items, which lack guarantees and rely solely on the seller's word regarding condition, refurbished devices come with assurance of quality and reliability.

What payment options are available?

We offer a variety of payment options to make your shopping experience as convenient as possible! You can pay using all major credit cards, Apple Pay, Google Pay, Shop Pay, Afterpay, Zip Pay, and PayPal. If you prefer, we also accept bank deposits and even cash for in-store purchases!

At a Glance

Processor
Intel Core i5
Memory
8GB
Storage
256GB SSD
Display
No Display

Safe & Secure

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

We ensure secure processing of your payment information and do not retain or have access to your credit card details.

Description

HP ProDesk 400 G4 USDT — Compact Business Desktop

  • Intel Core i5-8500T processor for fast, energy-efficient everyday computing
  • 8GB DDR4 RAM handles multitasking and business applications with ease
  • 256GB NVMe SSD delivers rapid boot times and snappy application launches
  • Ultra-slim USDT form factor saves desk space without sacrificing performance
  • Windows 11 Pro pre-installed — ready for modern business workloads
  • Multiple display outputs support dual-monitor productivity setups

The HP ProDesk 400 G4 USDT is an ultra-slim desktop designed for business users who need reliable performance in a compact package. Powered by an Intel Core i5-8500T processor with a 256GB NVMe SSD, it boots in seconds and handles office productivity, web browsing, and light data processing without breaking a sweat. The 8GB DDR4 RAM keeps multiple applications running smoothly throughout the day.

The USDT (Ultra-Slim Desktop Tower) form factor is just 3.5cm thin, making it easy to mount behind a monitor or tuck under a desk. Despite its size, it packs genuine business-grade connectivity including USB 3.0, DisplayPort, and optional expansion. This refurbished unit has been fully tested and refreshed by Reboot IT's Melbourne technicians — ideal for offices, reception desks, or remote workstations.

Technical Specifications

Specification Details
Processor Intel Core i5-8500T (6-Core, up to 3.5GHz, 9MB Cache)
RAM 8GB DDR4-2666 SDRAM
Storage 256GB NVMe SSD
Form Factor Ultra-Slim Desktop Tower (USDT)
Operating System Windows 11 Pro
Graphics Intel UHD Graphics 630
Ports USB 3.1, USB 3.0, USB 2.0, DisplayPort, VGA, RJ-45
Power Supply 65W external adapter

Is It Right For You?

Use Case Verdict
Office productivity (Word, Excel, email) ✅ Excellent
Space-constrained desk setups ✅ Ideal — 3.5cm thin USDT
Dual-monitor setups ✅ Supported via DisplayPort + VGA
Video editing / heavy graphics ❌ Not recommended — integrated GPU only
Energy-efficient office deployment ✅ 35W TDP processor, 65W PSU

Condition Grades

Grade Description
Excellent Minimal signs of use, cosmetically clean, fully functional
Good Light scuffs or marks from normal office use, fully functional
Fair Visible wear, may have dents or deeper scratches, fully functional

Frequently Asked Questions

Does this come with a keyboard and mouse?

No, the HP ProDesk 400 G4 USDT is sold as a desktop unit only. A power cable is included. Peripherals can be added at checkout.

Can it support two monitors?

Yes — the USDT includes both a DisplayPort and a VGA output, allowing dual-monitor setups out of the box.

Is RAM or storage upgradeable?

The USDT form factor has limited expansion, but RAM can typically be upgraded to 16GB. Storage can be swapped to a larger NVMe SSD if needed.

12-Month Warranty Included

Every HP ProDesk 400 G4 USDT sold by Reboot IT is fully tested before dispatch and backed by our 12-month warranty. Our Melbourne-based team is here to help if you need support.

Specifications
  • Model
    HP ProDesk 400 G4
  • Processor
    Intel Core i5
  • RAM
    8GB
  • Storage
    256GB
  • Storage Type
    SSD
  • Resolution
    No Display
  • Connectivity
    Ethernet Port
  • Video Inputs
    HDMI, DisplayPort
  • Colour
    Black
  • Warranty
    1 Year

What's in the box
  • HP - HP ProDesk 400 G4
  • Tax invoice
  • Power cable
By buying refurbished, you avoid
375kg

of CO₂ vs. manufacturing new

And divert
7.5kg

of e-waste from landfill

Source: HP EliteDesk PCF datasheet — per unit.

Why the HP ProDesk 400 G4?

Reliable Intel Core i5-8500T performance for everyday office tasks
Compact USDT form factor saves desk space without sacrificing connectivity
Windows 11 Pro ready for modern security and productivity requirements

HP ProDesk 400 G4 USDT i5 8600T 2.3GHz 8GB 512GB SSD W11P Computer | 3mth Wty

Business-Ready Performance

Intel Core i5-8500T with 8GB DDR4 RAM handles office tasks, web browsing, and multitasking smoothly all day.

Fast NVMe SSD Storage

256GB NVMe SSD delivers faster boot times and quicker app launches compared to traditional hard drives.

Ultra-Compact USDT Design

At just 3.5cm thin, the USDT fits behind a monitor or under a desk without taking up valuable workspace.

Built-in Wi-Fi

Integrated wireless connectivity reduces cable clutter h30434.hp?.

Business-Ready Performance

Intel Core i5-8500T with 8GB DDR4 RAM handles office tasks, web browsing, and multitasking smoothly all day.

Fast NVMe SSD Storage

256GB NVMe SSD delivers faster boot times and quicker app launches compared to traditional hard drives.

HP ProDesk 400 G4 USDT i5 8600T 2.3GHz 8GB 512GB SSD W11P Computer | 3mth Wty

Ultra-Compact USDT Design

At just 3.5cm thin, the USDT fits behind a monitor or under a desk without taking up valuable workspace.

Built-in Wi-Fi

Integrated wireless connectivity reduces cable clutter h30434.hp?.

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James Lees
All-in-one Solution for Home Office

I was looking for an in-expensive all-in-one solution for my home office to replace my existing desktop and monitor. I found this EliteOne 800 on reboot IT for under $200. I wasn't sure what to expect. It arrived within two days!!!! I upgraded the RAM, replaced the HDD and installed Windows 11. This is unbeatable value and was the cheapest price online. Coupled with a 3-month warranty, Reboot IT are by far the best online refurbished retailer I have used. Awesome!

Reboot IT
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Melinda Panuan
Excellent

Excellent work

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steve maloney
exactly as described and works well

exactly as described and works well , just like the staff down there. 10/10

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How Reboot IT Revitalises and Certifies Refurbished Equipment

Learn more

  • Device Arrival

    We carefully source certified refurbished computers from trusted corporate, government, and education sectors, giving each device a fresh start and new purpose.

  • Secure Data Wipe

    To protect your privacy, all previous data is securely and thoroughly erased from every tested refurbished device before it reaches you.

  • Comprehensive Testing

    Each certified refurbished computer undergoes detailed testing with specialized software to ensure full functionality, and any worn or faulty components are replaced exclusively with original parts, guaranteeing reliable, long-lasting performance for your tested refurbished device.

  • Cleaning & Grading

    Every computer is professionally cleaned and carefully graded, so you know exactly what condition your certified refurbished computer is in—giving you full confidence in your purchase.

WELCOME TO REBOOT IT

Australia's number one source for Refurbished Desktops, Laptops, Monitors and more.

Since 2001, Reboot IT has been Australia’s trusted source for certified refurbished computers and IT hardware. Every device is rigorously tested and professionally refurbished to deliver reliable, like-new performance — all at a fraction of the cost of new equipment. With over 100,000 satisfied customers, we combine expert quality with unbeatable value. Shop with confidence knowing your refurbished device comes backed by warranty and supports sustainable tech reuse.

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