"Information about Intel Engineering/Qualification Sample Processors". Archived from the original on 2012-06-08. https://web.archive.org/web/20120608045725/http://www.intel.com/support/processors/sb/CS-030747.htm
"A Sampling of Sample Processors". The CPUShack Museum. Retrieved 2 April 2025. https://www.cpushack.com/2018/07/23/a-sampling-of-sample-processors/
"What Is the Difference between ES (Engineering Sample) and QS (Qualification Sample) Processors?". Intel Support Knowledge Base. Retrieved 2 April 2025. https://www.intel.com/content/www/us/en/support/articles/000056642/processors/intel-core-processors.html
"Signs an Intel CPU May Be an Engineering Sample | tweedge's blog". chris.partridge.tech. Retrieved 2024-09-08. https://chris.partridge.tech/2021/identifying-intel-engineering-samples/
"Engineers arrested for selling sample CPUs on eBay". TechSpot. 2012-01-04. Retrieved 2024-12-17. https://www.techspot.com/news/46902-engineers-arrested-for-selling-sample-cpus-on-ebay.html
"Why You Should AVOID Intel Core 2 Engineering Samples Rev. 4.1". Tech ARP. Retrieved 2 April 2025. https://archive.techarp.com/showarticleba80.html?artno=407&pgno=4