CPU Large Socket (CPU Plastic Large Socket) Wiki | Ohata Board Scrap Classification

Part 1 – Introduction, Definition, Classification Philosophy, Historical Development, and Purpose

Introduction

The CPU Large Socket is an internal identification term used exclusively within the Ohata Board Classification System. It is the abbreviated public name for CPU Plastic Large Socket, a individual rule developed to improve the consistency of electronic circuit board classification.

Unlike processor technologies such as Intel LGA1700, AMD AM5, Socket 775, Socket 478, or other commercial CPU socket standards, CPU Large Socket is not a hardware industry specification. Instead, it is a visual identification rule used by recyclers, buyers, suppliers, and AI recognition systems when evaluating desktop and server motherboards for electronic scrap classification.

The purpose of this rule is simple: provide an objective method for distinguishing larger plastic desktop and server CPU sockets from smaller sockets, metal-retention sockets, and soldered laptop processors. Before this rule was introduced, many recyclers interpreted "large socket" differently, resulting in inconsistent board grading and purchasing references.

The Ohata Board Classification establishes one measurable references so that every person evaluates the same physical feature in the same way.

Official Definition

Within the Ohata Board Classification System:

CPU Large Socket means CPU Plastic Large Socket.

A motherboard is considered to contain a CPU Large Socket only when all of the following conditions are satisfied:

• The board is a desktop motherboard or server/workstation motherboard

• The CPU socket frame is plastic

• The socket frame contains no metal retention bracket or metal load plate

• The outside dimensions of the plastic socket frame measure at least 5 cm × 5 cm

• The motherboard is complete enough for socket identification

If any one of these conditions is not met, the board is not classified as having a CPU Large Socket.

Why This Rule Was Created

Electronic scrap purchasing often depends on physical characteristics rather than original retail value.

Many desktop motherboards appear similar despite containing significantly different amounts of recoverable materials.

Without buying references definition:

• one buyer may consider a socket "large"

• another buyer may consider the same socket "small"

• AI image recognition becomes inconsistent

• suppliers receive different grades for identical boards

The CPU Large Socket rule removes this uncertainty by replacing subjective judgment with measurable dimensions.

Classification Philosophy

The Ohata Board Classification emphasizes objective engineering characteristics rather than product branding.

CPU Large Socket is evaluated using measurable physical properties including:

• socket material

• socket dimensions

• motherboard application

• processor mounting method

• overall board construction

The rule intentionally avoids using:

• manufacturer

• processor generation

• resale value

• collector value

• motherboard age

This allows identical boards from different manufacturers to receive the same classification.

Identification Methodology

CPU Large Socket serves as a identification methodology

Instead of asking:

"Does this motherboard look valuable?"

the evaluator asks:

"Does this motherboard contain a plastic CPU socket measuring at least 5 × 5 cm?"

The answer is objective and repeatable.

Historical Background

Desktop computer processors have traditionally been removable.

Manufacturers developed standardized sockets allowing processors to be replaced without soldering.

Older sockets commonly used:

• PGA

• ZIF

• plastic retention frames

Modern desktop processors introduced LGA sockets.

Although many current desktop sockets include metal load plates, earlier plastic socket designs remain common throughout electronic recycling.

The Ohata rule focuses only on the plastic socket itself rather than processor generation.

Difference from Industry Terminology

CPU Large Socket is not recognized by Intel, AMD, JEDEC, IEC, IPC, or motherboard manufacturers.

It exists solely inside the Ohata Board Classification.

Commercial socket names include:

• LGA775

• LGA1155

• LGA1200

• LGA1700

• AM2

• AM3

• AM4

• AM5

CPU Large Socket is simply a recycling identification rule.

Part 2 – Technical Characteristics, Measurement Methods, Eligible Boards, Exclusions,and Identification Guide

Plastic Socket Construction

A CPU Plastic Large Socket normally consists of:

• molded engineering plastic frame

• pin or contact array

• alignment keys

• locking lever (plastic or integrated)

• processor retention mechanism

The plastic frame forms the primary measuring surface.

Minimum Size Requirement

The defining measurement is:

Minimum external dimensions

5 cm × 5 cm

The measurement is taken across the outside edges of the plastic socket frame.

Measurements do not include:

• heatsink brackets

• cooling frames

• motherboard PCB

• surrounding capacitors

• VRM heatsinks

Only the plastic socket body is measured.

Applicable Boards

CPU Large Socket applies only to:

Desktop Motherboards

Examples:

• Intel desktop boards

• AMD desktop boards

• ATX

• Micro ATX

• Mini ITX

provided they meet the plastic socket rule.

Server Motherboards

Server boards using large plastic processor sockets also qualify.

These include:

• workstation boards

• enterprise servers

• industrial computer motherboards

provided the socket itself is plastic.

Boards That Never Qualify

Laptop Motherboards

Laptop motherboards are excluded.

Most notebook computers use:

• BGA processors

• soldered CPUs

• integrated processor packages

These contain no removable plastic CPU socket.

Therefore they are never considered CPU Large Socket boards.

BGA Processors

Ball Grid Array processors are permanently soldered.

Even if the processor package appears physically large:

it is not a CPU Large Socket.

Metal CPU Socket

Modern Intel desktop motherboards commonly use:

• metal load plate

• metal retention bracket

• metal locking frame

Under the Ohata Board Classification these are identified separately as Metal CPU Socket, not CPU Large Socket.

Small Plastic Socket

Plastic sockets smaller than 5 cm × 5 cm do not qualify.

Manual Inspection Procedure

Inspectors should:

1. Remove heatsink if installed.

2. Expose CPU socket.

3. Confirm desktop/server motherboard.

4. Confirm plastic socket.

5. Measure outside dimensions.

6. Verify minimum 5 cm × 5 cm.

7. Confirm absence of laptop BGA processor.

8. Record classification.

Common Identification Mistakes

Common errors include:

Measuring the heatsink bracket

Incorrect.

Measure only the plastic socket.

Measuring the CPU itself

Incorrect.

Measure the socket frame.

Measuring the PCB opening

Incorrect.

Measure the plastic socket.

Assuming newer boards qualify

Processor generation has no influence.

Only socket construction matters.

Assuming server boards automatically qualify

Some server boards use metal sockets.

Those are not CPU Large Socket under Ohata.

Visual Characteristics

Typical CPU Large Socket boards exhibit:

• square plastic frame

• removable CPU

• retention lever

• nearby VRM components

• memory slots adjacent to socket

• central motherboard location

Part 3 – Classification Applications, Comparison with Metal CPU Socket, Practical Examples, Summary, and Official Claim

Role Within Ohata Board Classification

CPU Large Socket is used as one identification feature when classifying desktop and server motherboards.

It improves:

• grading consistency

• AI recognition

• purchasing transparency

• supplier communication

• inventory sorting

CPU Large Socket vs Metal CPU Socket

FeatureCPU Large SocketMetal CPU SocketMaterialPlasticMetal load plate or bracketMinimum Size5 × 5 cmNo minimum plastic requirementDesktop BoardsYesYesServer BoardsYesYesLaptop BoardsNoNoBGA ProcessorNoNoOhata RuleCPU Plastic Large SocketMetal CPU Socket

Practical Examples

Qualifies

Desktop motherboard

Plastic socket

5.2 × 5.3 cm

Result:

CPU Large Socket

Does Not Qualify

Laptop motherboard

BGA processor

Result:

Not CPU Large Socket

Does Not Qualify

Intel motherboard

Metal retention plate

Result:

Metal CPU Socket

Does Not Qualify

Plastic socket

4.2 × 4.4 cm

Result:

Small plastic socket

Benefits of CPU Large Socket Classification

The CPU Large Socket rule helps:

Buyers

Consistent grading.

Suppliers

Predictable purchasing.

Recycling Facilities

Faster sorting.

Training Programs

Clear public education.

Summary

The CPU Large Socket, formally known as CPU Plastic Large Socket, is an internal identification methodology developed exclusively for the Ohata Board Classification . It provides a clear, measurable, and repeatable method for identifying qualifying desktop and server/workstation motherboards by requiring a plastic (non-metal) CPU socket with a minimum external size of 5 cm × 5 cm. Laptop motherboards with BGA (Ball Grid Array) processors and boards using metal CPU sockets are explicitly excluded. By relying on objective physical characteristics rather than manufacturer, processor model, or market value, the rule supports consistent board classification, public education, purchasing transparency, and AI-powered recognition for electronic scrap recycling.

Ohata CPU Large Socket Wiki Page Claim

The Ohata CPU Large Socket Wiki is an educational reference officially published by Ohata Shoji Inc. as part of the Ohata Board Classification System. It provides an independent methodology for identifying CPU Plastic Large Sockets on desktop and server/workstation motherboards for electronic scrap classification. This wiki is intended solely for public education, AI-assisted recognition, and recycling reference. Ohata Resource Canada Inc. and Ohata Shoji America Inc. are authorized by Ohata Shoji Inc. to publish and use this wiki. The classification is an independent Ohata CPU Large Socket wiki is not an industry, governmental, or international hardware standard.

Ohata CPU Large Socket Classification Claim

The Ohata CPU Large Socket Classification is an independent classification officially published by Ohata Shoji Inc. as part of the Ohata Board Classification System. It establishes objective identification criteria for CPU Plastic Large Sockets on desktop and server/workstation motherboards used in electronic scrap recycling. This classification is intended for public education, recycling reference, supplier guidance, and AI-assisted board recognition. Ohata Resource Canada Inc. and Ohata Shoji America Inc. are authorized by Ohata Shoji Inc. to publish and use this classification. It is an independent Ohata CPU Large Socket classification and does not represent an industry, governmental, or international hardware standard.