HP ProOne 400 G4 Intel Core i5 8GB RAM 256GB SSD Win 10 Home Desktop PC

QuickFind: 845506 Mfr part code: 4YV88EA#ABU
  • Intel Core i5-8500T 2.1GHz
  • 8GB DDR4 + 256GB SSD
  • 20" Non-Touch HD+
  • DVDRW + Intel UHD
  • Windows 10 Home
Trade-In deal

Trade-In deal available with this product until 31st Jul 2019

Businesses - Claim up to £200 when you Trade In your old PC or laptop. Rewards may vary and terms apply so please read carefully before purchase Click here to learn more

Product Description

HP ProOne 400 G4 Intel Core i5 8GB RAM 256GB SSD Win 10 Home Desktop PC

The versatile AiO for your growing business

Easy to deploy, sleek, and feature-rich, the HP ProOne 400 20" All-in-One PC features a contemporary design with business-class performance, collaboration, security, and manageability features.


Sleek, elegant design

Stylish design and clean lines makes this AiO suitable for a front desk or an open office for space-constrained work environments.


HP exclusive security and manageability

Help prevent data breaches and downtime with HP BIOSphere Gen4 and simplify management with HP Manageability Integration Kit Gen2






  • Intel® Core™ i5-8500T 2.1 GHz
  • Intel® UHD Graphics 630
  • Up to 3.5 GHz with Intel® Turbo Boost Technology
  • 9 MB cache
  • 6 cores


  • 8 GB DDR4-2666 SDRAM
  • Configuration: 1 x 8 GB
  • 2 x SODIMM


  • 256 GB PCIe® NVMe™ SSD

Optical Drive

  • DVD Writer


  • Operating System: Windows 10 Home 64bit


  • 50.8 cm (20") diagonal HD+ widescreen LCD anti-glare WLED-backlit
  • Resolution: 1600 x 900


  • Intel UHD 630 Graphics


  • Conexant CX3601 codec
  • 2 W internal stereo speaker
  • headset and headphone side port (3.5 mm)
  • multi-streaming capable

Input Devices

  • USB Business Slim Standalone Wired Keyboard


  • Intel® I219LM GbE

Power Supply

  • 90 W external power adapter


  • Width 48.91 cm
  • Depth 20.85 cm
  • Height 36.67 cm
  • Weight 5.77 kg



  • 1 headphone/microphone combo
  • 1 USB 2.0 Type-C™
  • 2 USB 3.1 Gen 1


  • 1 DisplayPort™ 1.2
  • 1 power connector
  • 1 RJ-45
  • 2 USB 3.1 Gen 1


  • 1 M.2 2230
  • 1 M.2 2230/2280
  • 1 SD media card reader


  • 1 year (1-1-1) limited warranty and service offering includes 1 year of parts, labor and on-site repair

Technical Specification

HP ProOne 400 G4 Intel Core i5 8GB RAM 256GB SSD Win 10 Home Desktop PC

Graphics Controller

HDCP compatible Yes
Graphics Processor Intel UHD Graphics 630
Video Interfaces DisplayPort
HDCP Compatible Yes
Max Monitors Supported 3

Audio Output

Speakers Bang & Olufsen sound bar
Speakers Included 2 x right / left channel
Max Sampling Rate 192 kHz
Compliant Standards High Definition Audio


Camera Yes
Resolution (MP) 1 Megapixel
Resolution HD

Input Device

Type Mouse, keyboard


Keyboard Name HP Business Slim Keyboard
Interface USB
Localization & Layout UK


Technology Optical
Interface USB

Audio Input

Type Dual array microphone


Ethernet Controller Intel I219-LM
Wireless LAN Supported Yes
Wireless NIC Intel Wireless-AC 9560
Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, Bluetooth 5.0
Features Wake on LAN (WoL), ACPI support, PXE 2.1 support
Compliant Standards IEEE 802.3, IEEE 802.3u, IEEE 802.3i, IEEE 802.1Q, IEEE 802.1p, IEEE 802.11b, IEEE 802.11a, IEEE 802.3x, IEEE 802.11g, IEEE 802.1x, IEEE 802.11i, Wi-Fi CERTIFIED, IEEE 802.11n, IEEE 802.3az, IEEE 802.11ac, Bluetooth 5.0

Expansion / Connectivity

Bays 1 (total) / 0 (free) x external 5.25" Slim Line ¦ 1 (total) / 1 (free) x internal 2.5"
Slots 1 (total) / 0 (free) x M.2 Card - 2230 ¦ 1 (total) / 0 (free) x M.2 Card - 2280/2230
Interfaces 1 x USB-C ¦ 4 x USB 3.1 Gen 1 (one of them is charging) ¦ 1 x DisplayPort ¦ 1 x headphones/microphone ¦ 1 x LAN (Gigabit Ethernet)


Theft/Intrusion Protection Security lock slot (cable lock sold separately)
Security Slot Type Kensington security slot
Compliant Standards RoHS, WEEE


Device Type Power adapter
Nominal Voltage AC 120/230 V (50/60 Hz)
Power Provided 90 Watt
Efficiency 89% (115VAC), 89% (230VAC)

Operating System / Software

OS Provided Windows 10 Home 64-bit Edition English

Manufacturer Warranty

Service & Support Limited warranty - parts and labour - 1 year - on-site

Dimensions & Weight

Dimensions & Weight Details 48.91 cm - 5.13 cm - 32.4 cm - 3.9 kg - without stand
Width 48.91 cm
Depth 5.13 cm
Height 32.4 cm
Weight 3.9 kg

Environmental Parameters

Min Operating Temperature 5 °C
Max Operating Temperature 35 °C
Humidity Range Operating 5 - 90%


Type Personal computer
Product Form Factor All-in-one
Built-in Devices Hood sensor
Embedded Security Trusted Platform Module (TPM 2.0) Security Chip
Localisation Language: English / region: United Kingdom

Processor / Chipset

CPU Intel Core i5 (8th Gen) 8500T / 2.1 GHz
Max Turbo Speed 3.5 GHz
Number of Cores 6-core
CPU Qty 1
Max CPU Qty 1
CPU Upgradability Upgradable
Processor Main Features Intel Turbo Boost Technology 2, Intel Smart Cache
Chipset Type Intel Q370

Cache Memory

Installed Size 9 MB
Cache Per Processor 9 MB


Installed Size 8 GB / 32 GB (max)
Technology DDR4 SDRAM
Effective Memory Speed 2666 MHz
Rated Memory Speed 2666 MHz
Form Factor SO-DIMM 260-pin
Slots 2 (Total) / 1 (empty)
Configuration Features 1 x 8 GB

Hard Drive

Type SSD - M.2 2280
Capacity 1 x 256 GB
Interface Type PCI Express
Features NVM Express (NVMe)

Storage Controller

Type 1 x SATA
Controller Interface Type SATA 6Gb/s

Optical Storage

Type DVD-Writer

Card Reader

Type Card reader
Supported Flash Memory Cards SD Memory Card


Monitor Type LED - TN
Diagonal Size 20"
Native Resolution 1600 x 900 (HD+)
Widescreen Display Yes
Image Aspect Ratio 16:9
Horizontal Viewing Angle 170
Vertical Viewing Angle 160
Image Brightness 250 cd/m²
Image Contrast Ratio 1000:1
Monitor Features Anti-glare, 72% NTSC colour gamut

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HP ProOne 400 G4 Intel Core i5 8GB RAM 256GB SSD Win 10 Home Desktop PC

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HP ProOne 400 G4 Intel Core i5 8GB RAM 256GB SSD Win 10 Home Desktop PC

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Add-ons and Accessories


HP 3 Year Onsite Warranty - Epac

£20.63 inc. vat
£39.98save £19.35
£17.19 ex. vat
£33.31save £16.12

HP Accessories

Kensington Black USB Wired Mouse

£6.47 inc. vat
£5.39 ex. vat

HP USB Slim Keyboard- Black

£19.17 inc. vat
£26.99save £7.82
£15.97 ex. vat
£22.49save £6.52

External HDD

Maxtor M3 1TB USB 3.0 Portable External Hard Drive

£42.12 inc. vat
£45.63save £3.51
£35.10 ex. vat
£38.02save £2.92


Office 365 Home 1 Year Subscription

£69.99 inc. vat
£58.32 ex. vat

Office Home and Business 2019 Medialess

£222.50 inc. vat
£185.41 ex. vat

Office Home and Student 2019 Medialess

£112.98 inc. vat
£94.15 ex. vat

Office 365 Personal 1 Year Subscription

£53.99 inc. vat
£58.56save £4.57
£44.99 ex. vat
£48.80save £3.81


Laptop or PC Installation Service 3-5 Working Days

£79.24 inc. vat
£66.03 ex. vat