Component obsolescence in an OEM computer

Why computer parts change

Consumer components are renewed every one or two years: motherboards, graphics cards and SSDs change model or revision at the pace of the market. For an office PC it does not matter; for a computer that sits inside your machine, certified and with your software validated, a change can mean testing everything again.

Sometimes the change is not even visible: an SSD that keeps its part number but changes controller or memory inside, or a board that moves to a new revision with a different network chip. That is why recording the model is not enough: the revision has to be fixed as well.

The notices to watch for

PCN (product change notification): the manufacturer announces that a part changes inside.
EOL (end of life): the part stops being made on a specific date.
LTB (last-time buy): the last day it can be ordered before end of life.

There are usually a few months between the notice and the end. Whoever watches those notices decides in good time; whoever finds out when placing the next order is already too late.

Choosing parts that last

The first line of defence is to design with long-life components. Server platforms and embedded and industrial lines are made for more years than consumer ones, and their manufacturers publish their roadmaps:

Processors from AMD and Intel embedded series, with availability announced for several years.
Industrial and server boards, which change revision less often.
Industrial or enterprise SSDs, with a fixed bill of materials.

It does not always pay off: an industrial part costs more and sometimes performs less. The sensible approach is to reserve it for what is hardest to revalidate (the board, the processor and the system drive) and use standard parts where a change has no effect.

Second sources and controlled revisions

For every critical part it is worth validating an equivalent alternative in advance: same form, same connections and same function. If the main part runs out, the change has already been tested.

Each part change becomes a revision of the machine (rev. A, rev. B…), with its bill of materials, its 24-hour test and its date. You approve the revision before the first unit is built, and every serial number stays linked to the revision it shipped with.

Keep a reference unit of each revision. If a strange fault appears in the field three years from now, being able to compare it with the failing unit saves weeks.

Last-time buys and safety stock

When an end of life arrives with no validated alternative, the way out is a last-time buy: work out how many units you will need until the end of your product, or until the next revision, and buy them in one go. Warranty spares have to be counted too.

For the riskiest parts, a safety stock agreed with the computer manufacturer stops a stock-out from halting your deliveries: a few weeks of consumption reserved and renewed with every order.

Software expires too

The system image, drivers and firmware are part of the product. Each hardware revision has its tested image, with version and date, and drivers pinned so that they do not update on their own.

From 11 December 2027, the Cyber Resilience Act requires security updates to be provided throughout the product’s support period. That calls for a platform that keeps receiving BIOS and system patches for all those years: one more reason to choose long-life parts.

What to ask your supplier for

The bill of materials for each revision, with the manufacturer, part number and revision of every part.
Written notice of any change, with time to validate it before production.
A validated alternative for the critical parts.
Monitoring of end-of-life notices and a last-time-buy proposal.
Each serial number linked to its revision and to its 24-hour test report.
Spare parts available throughout the warranty.

Manufacturers · seriesOEM programmeThe same validated platform for years, with your image and a serial number per unit.See →Guide · OEMOEM computer for your productWhat to ask the maker of the computer inside your machine.See →Guide · OEMFrom prototype to productionThe stages of launching an OEM computer: prototype, pilot run and production.See →Guide · regulationCyber Resilience ActWhat the CRA requires of the computer inside your machine.See →Guide · industrial computersFanless industrial mini PCWhen to choose one, which tests to check and which inputs to ask for.See →Guide · machine visionMachine vision computerGPU, cameras, PLC connection and form factor.See →

Frequently asked questions

How long is a consumer component made for?

It depends on the part, but consumer boards, graphics cards and SSDs usually change model or revision every one or two years. Server, industrial and embedded lines last considerably longer.

What is a last-time buy (LTB)?

It is the last order the manufacturer accepts before it stops making a part. It is calculated from the forecast of units until the end of the product, plus warranty spares.

Does certification have to be repeated if a part changes?

It depends on the part and the standard. That is why it pays to fix the critical parts, validate alternatives before you need them and document every revision: that way you know what changes and what has to be retested.

How much safety stock is needed?

Typically a few weeks of consumption of the riskiest parts, reserved and renewed with every order. It is adjusted to your forecast and to each component’s replenishment time.

Does your product have a computer inside?

Tell us what it does and how many units you expect a year. We will propose a platform with long-life parts and a closed bill of materials for each revision.

See the OEM programme