Engineering sample

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Integrated circuit prototypes for testing

title: "Engineering sample" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["integrated-circuits", "computer-hardware"] description: "Integrated circuit prototypes for testing" topic_path: "general/integrated-circuits" source: "https://en.wikipedia.org/wiki/Engineering_sample" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Integrated circuit prototypes for testing ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/f/f3/KL_Intel_Xeon_Prestonia_ES.jpg" caption="Xeon "Prestonia"]] engineering sample"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/b/be/KL_AMD_Mobile_Athlon_XP_ES.jpg" caption="Athlon XP]] engineering sample"] ::

Engineering samples are the beta versions of integrated circuits which are loaned to ODMs, OEMs and ISVs so that products can be tested prior to launch. Engineering samples are usually handed out under a non-disclosure agreement or another type of confidentiality agreement.

Several kinds of preproduction samples are made during a product's development, ranging from mechanical samples (for testing physical fit of a processor), electrical/thermal samples (for testing cooling and power draw), engineering samples (for early testing of a design) and qualification samples (made to test whether a design is ready for release). Some engineering samples with unlocked clock multipliers are valued by overclockers. Intel does not officially acknowledge a distinction between engineering and qualification samples.

Some engineering samples, such as Pentium 4 processors, were rare and favoured for having unlocked base-clock multipliers. More recently, Core 2 engineering samples have become more common and popular.

While engineering sample CPUs do occasionally appear on secondhand markets such as eBay, they are generally not authorized for resale and can suffer from unpredictable performance issues, compatibility issues, and lack of warranty support options. This is due to their unfinished nature compared to the retail version of the chip.

References

References

  1. "Information about Intel Engineering/Qualification Sample Processors".
  2. "A Sampling of Sample Processors".
  3. "What Is the Difference between ES (Engineering Sample) and QS (Qualification Sample) Processors?".
  4. "Signs an Intel CPU May Be an Engineering Sample {{!}} tweedge's blog".
  5. (2012-01-04). "Engineers arrested for selling sample CPUs on eBay".
  6. "Why You Should AVOID Intel Core 2 Engineering Samples Rev. 4.1".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

integrated-circuitscomputer-hardware