Most product configurators exist to show a buyer what something will look like. A PC configurator exists mainly to stop a buyer ordering something that will not work. The rules are physical and electrical: a processor fits one socket, a board takes one memory type, a case has a fixed clearance for a graphics card. Get those right and the visual side, such as case colour, lighting and keycaps, becomes the easier half.

This guide is for UK component retailers, custom PC builders and peripheral brands. It covers the rules a hardware configurator must handle, the levels to choose from, and how the result reaches the basket or a quote.

Why hardware buyers need help choosing

Published data on hardware compatibility problems is scarce. I found no source that measures how many PC parts come back because they did not fit or connect, in the UK or elsewhere. The case for help rests on what the categories are and how retailers say they are tackling returns.

Memory is a good example of a category where small details decide whether a part works. Memory modules made up 32.3% of Corsair’s net revenue in 2025, up from 29.2% the year before (Corsair 10-K, 2025). That is a global company figure, from the portion of the filing I read. A memory kit has to match the board’s memory generation, its slot count and, ideally, its maker’s list of tested kits.

Peripherals are the visual side of the market. Logitech’s keyboard and combo sales reached $937.6 million in its year to March 2026, and pointing devices $858.9 million, up 6% and 9% (Logitech results, May 2026). Again these are global figures for one company. Keyboards in particular are bought on layout, size, switch feel and colour, all of which a configurator can show.

IMRG and the returns vendor ReBound surveyed 41 UK retailers about cutting returns, a small sample. Of those, 74.4% were exploring clearer sizing charts and better product descriptions (IMRG and ReBound, 2022). A compatibility checker is the hardware version of that idea: the description, applied to the buyer’s own system.

What UK hardware pages offered for choosing

I checked eight UK product pages for cases and gaming keyboards in October 2026, and seven were readable. The check read page text only, so a viewer drawn by script would not have shown.

  • 1 of 7 had a compatibility checker on the product page.
  • 1 of 7 listed configurators, parts finders and a PC designer in its site menu, with nothing tied to the product.
  • 0 of 6 let the buyer choose a colour or specification on the page, where it could be seen. On the seventh it was not detectable. Each case was a single-colour listing.
  • 3 of 7 gave full dimensions or clearances, and 2 more gave partial figures.
  • 0 of 7 mentioned 360, 3D or AR viewing. One had a product demo link, which led to a PDF.

The best case pages gave exactly the numbers a builder needs. The two that listed clearances gave a maximum graphics card length of 360 mm and 410 mm, and a maximum cooler height of 170 mm and 175 mm. That data sat on the page as text, but nothing used it to check a buyer’s chosen parts.

What a PC configurator has to handle

This is where hardware differs from almost every other configurator category. The rules below are typical of how custom PC builders and component shops approach compatibility. The exact set depends on your range.

Compatibility rules

  • Processor and board. The CPU socket must match the board. Some boards need a firmware update before they support a newer processor, which is a warning rather than a block.
  • Memory. Memory generation must match the board, and the number of modules must not exceed the slots. Capacity per slot and the board maker’s tested list can add warnings.
  • Form factor. The board size (ATX, Micro-ATX, Mini-ITX) must be supported by the case. Power supplies come in standard and small form factor sizes too.
  • Clearances. Graphics card length against the case limit, cooler height against the case limit, and power supply length where the case states one. Front radiators or fans can reduce the space for a long card in some cases.
  • Cooling. Radiator size against the case’s mounting positions, and the cooler’s mounting kit against the socket.
  • Power. The estimated draw of the chosen parts, plus headroom, against the power supply’s rating. The supply also needs the right connectors for the graphics card.
  • Storage. The number of M.2 slots, their supported generation, and any lanes the board shares with SATA ports.

Blocks, warnings and explanations

Not every rule should stop the order. A wrong socket is a hard block. A tight clearance, a firmware update or thin power headroom is a warning the buyer can accept. Either way, the builder should explain the reason in plain words, with the numbers. A message such as “this card is longer than this case allows with a front radiator fitted”, with both lengths shown, teaches the buyer something. A greyed-out button does not.

Data behind the rules

Every rule depends on a field: socket, memory type, length in millimetres, rated wattage, connector list. Those fields have to exist for every product, in one unit, and be updated when new parts launch. Supplier feeds often do not arrive in that state. Plan who cleans the data and how a new card gets its clearance figures before it goes on sale. The product data guide covers structure in more detail.

Price, stock and lead time

A full builder prices each part live and adds assembly, testing and warranty. Stock needs checking per part, ideally with a reservation once the order is placed. The lead time should combine part availability with workshop time. Say what happens if a part runs out mid-order: a like-for-like substitute with the buyer’s consent, or a delay.

The visual half: keyboards, cases and desks

Peripherals and cases are where images do the work. A keyboard builder might cover size, UK ISO or US ANSI layout, switch type, case colour and keycap set. A case builder might show glass panels, fan colour and lighting. These follow ordinary option rules: a keycap set may not include a UK enter key, and a case colour may limit which fans match.

Choosing the right level

LevelWhat it does for hardwareSuitsWatch out for
Colour swapperSwitches the image between a part’s colourwaysCases, keyboards, mice and headsets in several coloursEach colour is often its own SKU, so the swap must change the product, not only the photo
Layered 2D imagesBuilds a picture from layers, such as a keyboard base plus keycapsKeyboard builders and cases with chosen fansEvery layer needs rendering from the same camera angle
360 spinRotates a set of photosCases and coolers bought partly on looksMany images per product; heavy on mobile if loaded at once
3D viewerA real-time model with materials and lightingCustom keyboards and showpiece buildsLighting effects are hard to show faithfully; test on mid-range phones
ARPlaces a model on the buyer’s deskLarge monitors and full-tower cases, where size is the doubtLittle value for parts that sit inside the machine
Compatibility checkerChecks one part against the buyer’s existing systemSingle upgrades: a card, a cooler, a memory kitOnly as reliable as the clearance and socket data
Full PC builderStep-by-step build with rules, live price and stockCustom system buildersThe most data and the most upkeep of any level
Product finderAsks about games, resolution, software and budget, then suggests buildsBuyers who do not know the partsMust not promise performance you cannot back up

Room planners do not fit this category and are left out.

Where AI fits

AI can help in three places, each with a clear limit.

  • A guided finder. A buyer describes what they play or edit, their screen and their budget, and gets two or three suitable builds. The suggestions must come from your stocked parts and your rules, not from the model’s general knowledge.
  • Answering fit questions. “Will this cooler fit my case?” can be answered well if the answer is drawn from your clearance data. If the data is missing, the assistant should say so and offer a human.
  • Generated imagery. Lifestyle scenes of a chosen case and lighting on a desk can save photography. They should never show a colour, panel or part that the buyer cannot order.

The main risk is confident invention. A language model can state a wrong socket, an imaginary connector or a frame rate nobody measured. Keep answers tied to structured data, log what the assistant says, and have a person check builds before they reach the workshop.

Basket, quote and trade routes

How the result reaches the order depends on what you sell.

  • Single parts checked against a buyer’s system go into the basket as normal products.
  • Custom systems typically go in as one build line with the parts listed, or as each part plus a build service line. Either way, the workshop needs a clear parts list and the stock needs reserving.
  • Trade and education buyers often want to save a specification, export it, and request a quote with prices ex VAT. That quote should reach your CRM with the full parts list attached. Saved builds are covered in save and share product configurations.

My integration work covers Shopify and WooCommerce baskets, quote forms and the CRM or ERP behind them. From 2021 to 2025 I built Praxis Digital 3D, a browser-based configuration platform that more than 20 UK businesses used. An earlier MMU Knowledge Transfer Partnership I worked on produced an image-based configurator, released in 2019.

Try the demos

The PC and gaming hardware demos are image-based demos built on illustrative products. They show the kind of option changes described above. For the wider picture, see selling PC and gaming hardware online, PC hardware ecommerce SEO and PC hardware website performance.

Talk it through

If you sell components, custom systems or peripherals and want to know which level fits your range, send me a short note about your catalogue and platform. I reply within two UK working days.

Sources