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HP Pro Small Form Factor 400 G9 Desktops

Reliable, Upgradeable Computing for Everyday Business Users

Includes a FIVE YEAR warranty as standard.



The HP Pro Small Form Factor 400 provides businesses with the same commercial-grade performance and reliability found in the smaller HP Pro Mini but in a slightly larger package to accommodate basic upgrades such as a simple graphics cards or storage.With a stylish appearance, the HP Pro Small Form Factor 400 is ideal for everyday business use. Dependable, robust, upgradeable, secure and – when you buy one from IT\norwich – you’ll get a five year on site hardware warranty as standard.


The HP Pro Small Form Factor 400 is suitable for users that wish to run office and accounting applications on a day to day basis but need to option of upgrading the graphics card at a later date. These computers support three screens, with two DisplayPort and one HDMI port as standard.

If you are not sure which model is right for you, check out the guidance notes below, or contact us in the usual way.


Pricing & Specifications

Model NameHP Pro Small Form Factor 400 G9 Desktop with i5HP Pro Small Form Factor 400 G9 Desktop with i7
Intel® Core™ i5 12500 (12th Generation)
Intel® Core™ i7 12700 (12th Generation)
CPU Benchmark
512 GB SSD
512 GB SSD
Onboard GraphicsIntel® UHD Graphics 770Intel® UHD Graphics 770
Audio PortYesYes
Video Outputs1 x DisplayPort™ 1.4
1 x HDMI 2.1
1 x DisplayPort™ 1.4
1 x HDMI 2.1
Networking1 x 1Gbps NIC RJ45
Realtek Wi-Fi 6 inc. Bluetooth
1 x 1Gbps NIC RJ45
Realtek Wi-Fi 6 inc. Bluetooth
HP Wired KeyboardYesYes
HP Wired MouseYesYes
Dimensions27 x 9.5 x 30.8 cm27 x 9.5 x 30.8 cm
PSU Type180 W or 240 W Power Supply180 W or 240 W Power Supply
Operating SystemWindows 10, Windows 11, or LinuxWindows 10, Windows 11, or Linux
Warranty5 Year HP NBD On Site 5 Year HP NBD On Site
Stock Code6U3H86U3H9
Our Price£789+ VAT£909+ VAT
Equivalent to around...43 pence per day over 5 years.49 pence per day over 5 years.


PC Specific Options

These options are available on this PC and while they can be purchased at any time, these prices apply only when purchasing a new PC:

  • Upgrade from the included keyboard and mouse to the HP 655 Wireless Keyboard & Mouse Combo for £42 + VAT
  • Upgrade from the onboard graphics card to a dedicated NVIDIA T400 2GB GDDR6 Graphics Card for £99+ VAT
  • Add an additional 1TB PCIe TLS SSD for £319 + VAT

CPU Benchmark

The names of the computer processors (AMD Ryzen, Intel Core i5, Intel Core i7 etc) are made up by marketing teams to try and help users understand which ‘range’ they are buying into – but these names names are a poor indicator as to how ‘fast’ a given computer processor will be. In the table above we have provided independently verified performance benchmarks – a comparison of real world speed – for each processor. The benchmarks simply show how well a product may do against other products. When comparing benchmarks, the higher the value of the results, the better. For further details and the most up to date benchmarks for these processors, please see here:

Memory (RAM)

RAM is the temporary memory of a computer which is not used until the computer is switched on. The operating system that loads when the computer starts – and the programs you open – will ‘load’ into this memory. If you try to open too many programs at once then the computer will either slow down or – in some circumstances – grind to a halt. As you close programs they ‘unload’ from the memory and allow the computer to reuse it for something else.

You can see that computers with more memory will allow more programs (or more complex programs) to run at the same time before slowing down. For everyday use we recommend a minimum of 8GB RAM if your users only use one or two applications at a time, but where users are likely to have a number of applications open at the same time we rec0mmend 16GB RAM instead. Budget conscious customers can go for 8GB now but upgrade to 16GB RAM or 32GB RAM at a later date though of course this typically works out to be more expensive in the long run.

Storage (SSD Hard Disk)

A computer needs enough storage to store the operating system, installed programs and saved files. For most customers with a few office programs a 256GB SSD is adequate, but for power users or to “future proof” your PC a 512GB SSD is necessary. Note that ALL of the computers we supply will have the faster style SSD hard disks installed – we no longer supply the slower HDD style of disk in desktop computers unless we have a good reason to do so. Disks can easily be upgraded to higher capacity versions at a later date though of course this typically works out to be more expensive in the long run.

Onboard Graphics

These computers include an “onboard” graphics system which is perfectly adequate for most users running line of business applications. Users that run word processors, spreadsheets, email, web and accounts software will have no problem with these applications, even the occasional use of presentation tools, 2D CAD and basic image manipulation will be okay on the systems here showing 16GB RAM. At one of our sites, most of a design and marketing team uses these HP ProDesks to run Adobe Creative Cloud, albeit at a basic level, but we’ve found some Adobe users do need something better. These computers are not suitable for users that run graphics intensive applications such as CAD / CAM / Video Editing etc should contact us to get a quote on a more powerful computer that also includes a dedicated graphics card.

Operating Systems

Microsoft Windows 10 & 11

At time of writing (January 2023) most customers still run Microsoft Windows 10 Professional installed in order for their computer to work in their business environment but on some models Microsoft Windows 11 will is starting to become the standard install. We will discuss which is best for you at time of preparation.

Linux Distributions (e.g. Mint, Debian, Ubuntu)

In homes and businesses, some customers are switching on to the possibilities provided by Linux based operating systems which offer a lower total cost of ownership (TCO). In line with our Purpose and Values we wish to promote these operating systems as valid alternatives. Such operating systems are completely free, transparently written, less demanding on hardware, and can be more stable and reliable than Windows by a very long margin. Read more about the principles of open source software here. We are happy to install Linux for you at no extra cost.


Every HP Pro Small Form Factor 400 we supply will include a 5 year manufacturers warranty as standard. We are taking this step for the following reasons:

  • A long warranty protects your investment and means a guaranteed 5 years use out of the purchased product.
  • The long warranty reduces the environmental impact of purchasing a computer that would otherwise be disposed of if it became faulty after a shorter warranty.
  • Generally speaking it is more cost effective to buy a good PC with a decent warranty than it is to buy a cheap PC with a poor warranty.
  • Things do go wrong from time to time – but we never have any problems getting HP to provide warranty service..

Our Price

The prices quoted above exclude VAT, pre-delivery preparation, installation and site fees which are invoiced according to How we Work. If you prefer to set up the device yourself we will be happy to deliver the computer without this additional work at no extra cost, please specify if you want us to “deliver only” at time of order.

Equivalent to…

It’s easy to be put off by price if one computer is more expensive than another one. For this reason we have shown you above how little the price difference is over the whole lifespan of the computer which we have calculated as follows:

price of computer ÷ number of days in warranty period

Why buying a better computer is more cost effective.

Contemplate this statement: When you buy a cheaper, lower specification computer you are committing yourself to having that slower model for its entire lifespan. If a faster computer can save your users just 10 minutes in a working day, you will save them 2500 minutes per year – equivalent to 26 working days over a five year period. This could be worth at least £2000 to you in extra productivity!

Every customer has their own unique budget and financial plan to consider and so we understand some customers will go for a cheaper model and others a more expensive one – but more powerful computers are clearly better value over the longer term and so we recommend you treat computers as investments rather than costs and within reason buy the best you can.


Please see our Desktop Accessories page for screens, headsets and more.