How to Read Intel Xeon Product Names and Ordering Numbers

Intel Xeon product names identify a processor's family, performance tier, generation, model, and specialized features, while ordering numbers identify the exact packaging, silicon revision, and production specifications. Understanding both is essential for selecting compatible processors, matching existing server configurations, and avoiding component ordering errors.

Two Intel Xeon processors can share the same model name but have different ordering codes, steppings, or production classifications. For example, an Intel Xeon Gold 6430 may be supplied as a boxed or tray processor, while differences in S-Spec codes can identify distinct silicon revisions.

Intel has changed its Xeon naming conventions across multiple generations, making it important to verify the complete product name and ordering information before purchasing. This guide explains how to decode Intel Xeon identifiers, distinguish processor generations, interpret suffixes, and confirm the exact components required for your server or workstation.

Reading an Intel Xeon Product Name

An Intel Xeon Scalable product name has five parts: brand, tier, generation, SKU, and suffix, describing the processor family, position within that family, specialized features, or workload optimizations.

Intel Xeon Performance Tiers

Intel Xeon Scalable processors use numeric identifiers corresponding to their performance tiers.

The first digit identifies the processor's tier, while the second digit identifies its generation.

Intel Xeon Generation Numbers

The second digit in a Xeon Scalable processor number identifies its generation and is a critical factor in determining platform compatibility.

Different Xeon generations use different sockets and platforms, so confirming the generation is one of the first steps when sourcing a replacement or upgrading an existing system.

The final two digits represent the processor's SKU within its tier and generation. Although a higher SKU number generally indicates a higher-positioned processor within the same family, Intel states that processor numbers distinguish features rather than directly measure performance. Consequently, SKU numbers should not be used to compare performance across different Xeon generations or families.

Complete reference: Intel's Xeon Processor Numbering Guide.

Renamed Xeon Line

Intel has renamed the Xeon line several times since 2010, and parts from every era are still in service. If you support long-lifecycle equipment, you will meet all of them.

Processor Families, Examples, and How to Read Them

Xeon Version Numbers

The version number in older Xeon E-series processors identifies a distinct processor generation and can determine whether the chip is compatible with an existing motherboard.

These are four different processors, not interchangeable versions of the same component. The v3 and v4 processors use a different socket from the original E5-2680 and E5-2680 v2, meaning they cannot serve as direct replacements without compatible hardware.

Older Xeon Suffixes

Suffix letters distinguish configurations within older Intel Xeon product families.

Intel continues to introduce additional naming variations. Its Xeon product list includes three-digit workstation models such as 698X, -B variants such as 6716P-B, and processors with a plus sign, including 6990E+. 

Intel Xeon Suffix Letters

Intel Xeon suffix letters identify specialized processor features, workload optimizations, socket configurations, and operating characteristics. Their meanings can change between processor generations, so each suffix must be interpreted alongside the full model number.

U and H Suffixes

The U and H suffixes identify socket-related restrictions that can directly affect motherboard and system compatibility.

Intel Xeon vs Intel Core: K and F Suffixes

Intel Xeon and Intel Core processors use different suffix conventions, meaning the same letter can identify entirely different features depending on the processor family.

Reading Intel Xeon Ordering Numbers

Intel Xeon ordering numbers identify the exact processor configuration, packaging format, silicon revision, and manufacturing information needed for accurate procurement. While the product name identifies the processor model, its ordering identifiers distinguish the specific unit being purchased.

Ordering Code: Boxed vs Tray Processors

The Intel ordering code identifies how a processor is packaged and sold, making it essential for specifying the correct product configuration on an RFQ.

Boxed processors use ordering codes beginning with BX and include Intel's boxed-processor warranty. Tray processors are supplied in bulk for system builders and use different prefixes depending on the processor generation.

The BX prefix identifies boxed packaging, while the following five-digit family code, 80713, identifies the processor family. The boxed ordering code ends with the processor number, 6430.

Tray ordering codes use an internal sequence rather than ending with the processor model number. Tray prefixes also vary by generation. The Xeon Gold 6430 uses PK, while older Intel processors may use prefixes such as CM or AT.

S-Spec Code: Identifying the Exact Silicon Revision

The Intel S-Spec code is a five-character identifier printed directly on the processor that connects it to a specific silicon stepping and specification. S-Spec codes are particularly important when sourcing replacement processors for existing server configurations or qualified production systems.

Intel distinguishes production processors from engineering and qualification samples using S- and Q-prefixes.

Engineering and qualification samples are pre-production components and should not be used in production builds.

Example: Xeon Gold 6430 carries the production S-Spec code SRM7A.

Stepping: Identifying the Processor Revision

Intel processor stepping identifies the silicon revision of a specific Xeon model and can affect requirements for matching processors in multi-socket systems. A processor model may undergo several silicon revisions during its lifecycle. Each stepping can have a separate S-Spec code. Many system manufacturers recommend matching processor steppings when configuring multi-socket servers. Consequently, specifying the correct S-Spec is especially important when purchasing a second CPU for an existing server.

Example: Xeon Gold 6430, the stepping is E5.

MM#: Intel's Master Material Number

The Intel Master Material Number (MM#) identifies a specific material configuration and supports product traceability, warranty inquiries, and country-of-origin verification.

The MM# appears on the processor packaging label and is used by Intel for internal material identification.

FPO: Identifying the Processor Production Batch

The Finished Process Order (FPO) number identifies the processor's manufacturing batch and provides an additional layer of component traceability.

The FPO is printed on the processor itself and on its corresponding box or packaging label. These numbers should match, allowing buyers and quality teams to verify that the received processor corresponds to its accompanying packaging information.

Where to Find Intel Xeon Ordering Information

Intel Xeon ordering identifiers can be found on the processor's heat spreader, packaging label, and official Intel product documentation.

Processor markings vary by generation but generally include the processor model number, S-Spec code, FPO or batch number, and, on newer processors, a two-dimensional matrix code. These physical markings allow buyers to verify processor identity without relying entirely on a datasheet.

Why Ordering Numbers Matter for End-of-Life Processors

Intel ordering codes, S-Spec numbers, MM# identifiers, and steppings are important when sourcing discontinued or end-of-life Xeon processors. Intel's Product Change Notifications (PCNs) and product discontinuance notices identify affected processors using these specific codes rather than relying exclusively on product names.

When purchasing obsolete processors, verifying these identifiers helps ensure that replacement components match the required specifications and previously qualified hardware.

Intel Xeon Processor Buying Checklist

Intel Xeon procurement requires verifying the complete product name, ordering code, S-Spec, and relevant traceability information both before purchasing and again upon the components' arrival. A processor model number alone may not provide enough information to confirm compatibility, especially for legacy systems, multi-socket configurations, or discontinued components.

What to Include in an Intel Xeon RFQ

What to Verify When Your Xeon Processors Arrive

Receiving inspections should confirm that the physical processor and its packaging match the original purchase requirements.

Source Intel Xeon Processors From Microchip USA

Microchip USA sources Intel Xeon server processors, including hard-to-find, obsolete, and end-of-life models, to help manufacturers and system operators maintain existing hardware and avoid costly redesigns.

Intel Products

As a full-line independent distributor of electronic components, we support specific Xeon models and configurations that may no longer be readily available through authorized distribution channels. Whether you need a legacy Xeon processor, a particular stepping, or a specific ordering code, our global sourcing network helps identify available inventory that meets your procurement requirements.

Request a quote below and provide the complete Intel Xeon product name and, when available, the S-Spec or ordering code so our team can help source the exact processor you need.