RAM-S(Gold finer server RAM) Grade buying scrap price

Introduction, Construction, Components, and Recycling Value

The classification is based on the physical construction and recoverable material value of the module—not on one specific brand, generation, capacity, or part number. Therefore, any memory module that satisfies the complete Ohata Memory S Grade standard is purchased at the applicable S Grade price. Older server RAM and newer enterprise modules may receive the same recycling grade when their construction and material characteristics meet the same standard.

An S Grade module normally consists of a multilayer printed circuit board, gold-plated contact fingers, multiple DRAM packages, resistors, capacitors and server-related control components. Depending on its design, the module may also contain a register, buffer or error-correction support components.

Common examples include:

• ECC server DIMMs

• Registered DIMMs, marked RDIMM

• Load-Reduced DIMMs, marked LRDIMM

• High-density enterprise memory modules

• Older server memory with numerous IC packages

• Gold-finger memory designed for servers, workstations or networking equipment

The PCB contains copper tracks and internal copper layers that connect the memory chips to the host system. Its edge connector is normally plated with nickel and a thin surface layer of gold to provide reliable electrical contact and resistance to corrosion. The module’s large number of IC packages, gold-plated fingers and multilayer PCB construction gives it a higher expected recycling value than ordinary desktop RAM, shielded RAM, damaged memory or blank modules.

The amount of recoverable material varies between manufacturers and generations. A visually larger module is not automatically more valuable, and a high-capacity label alone does not guarantee S Grade. Grading must be based on the actual construction, connector plating, application and component density.

Ohata Memory S Grade Classification and Identification Guide

The first identification step is to confirm that the item is a genuine memory module. It should have the long, narrow PCB shape associated with RAM, an edge connector designed to fit a memory socket and multiple memory-related components. Items that merely resemble RAM must not be automatically classified as memory.

Next, determine whether the module is intended for server or enterprise use. Useful indicators include manufacturer labels containing terms such as “ECC,” “Registered,” “REG,” “RDIMM” or “LRDIMM.” Some part-number descriptions may end in letters such as “R,” indicating registered server memory, although the exact naming system varies by manufacturer.

The following physical indicators support an S Grade classification:

1. Server or enterprise construction: The module was designed for servers, enterprise workstations, storage systems, telecom equipment or similar professional hardware.

2. Gold-plated edge contacts: The connector fingers should have a visible gold-colored plated surface. Silver- or tin-colored edge contacts are not S Grade under the uploaded standard.

3. ECC or registered design: ECC modules often carry additional memory chips for error-correction data. Registered modules normally include a register or control device that helps manage communication between the memory controller and the DRAM packages.

4. High IC density: S Grade modules generally carry numerous DRAM packages, often on both sides of the PCB. High component density is an important value indicator.

5. Recognizable and reasonably complete condition: The module should remain identifiable and suitable for normal recycling inspection. Severe damage, contamination, attached assemblies or removed sections can cause downgrading.

A common visual clue for ECC memory is an unusual number of DRAM packages. For example, an ECC module may have nine chips where a comparable non-ECC module has eight, or eighteen where a standard module has sixteen. However, chip count alone is not conclusive. Some registered modules use different package arrangements, and some desktop modules also have numerous chips.

Inspectors should use several indicators together: the label, PCB layout, register or buffer chips, application, gold contacts and total IC density. The Ohata procedure evaluates memory from the highest grade downward and then checks it again from the lowest grade upward. This two-direction review reduces errors caused by relying on a single feature.

Most importantly, DDR generation does not decide the grade by itself. Server DDR2, DDR3, DDR4 or DDR5 can all qualify for Memory S Grade when they meet the required construction standard. Likewise, a new DDR5 module is not automatically S Grade if it is ordinary desktop memory without the necessary server or enterprise characteristics.

Recoverable Materials, Buying Standards, and Handling

Memory S Grade may contain several commercially recoverable materials:

• Gold: Primarily found as thin plating on the edge contacts. Very small amounts may also be present inside certain semiconductor packages, although modern chips may use copper or other bonding materials.

• Copper: Present in PCB tracks, internal conductive layers and electronic connections.

• Tin and silver: Commonly associated with solder systems. The exact alloy depends on the module’s production period and manufacturer.

• Nickel: Frequently used as an intermediate layer beneath the gold plating and in component finishes.

• Palladium: May occur in small quantities in certain multilayer ceramic capacitors, depending on their composition and production technology.

The presence of these metals does not mean that every module contains the same concentration. Recovery yield depends on PCB construction, plating thickness, chip population and processing technology. Professional sampling and refining results are more reliable than visual estimates.

For S Grade buying, modules should be separated from desktop RAM and lower grades before delivery. Mixing server ECC/registered memory with ordinary desktop, shielded, trimmed, dirty or damaged modules increases inspection and sorting time. A mixed shipment may therefore be separated, reclassified or purchased according to the lower applicable grade.

Sellers should keep modules dry and avoid chemical cleaning, sanding or burning. Gold fingers should not be cut from the PCB, because trimmed connectors place the material in a lower category. Aluminum heat spreaders should be removed when safe and practical, especially when the underlying module must be inspected. Batteries, excessive wiring, socket assemblies and unrelated attachments should also be kept separate.

Final buying classification is determined after physical inspection. Labels can assist identification, but they cannot override the actual condition and construction of the material.

Comparison and Official Ohata Classification

The most important difference between S and A Grade is application and construction. Both may have gold-plated fingers, but S Grade is server or enterprise memory characterized by ECC/registered architecture and high IC density. Ordinary desktop and laptop RAM with gold contacts belongs to A Grade.

Heat-spreader-covered modules, silver-colored contacts and trimmed gold fingers correspond to B Grade. Mixed or damaged RAM belongs to C Grade, while blank and dummy modules belong to D Grade. Material that cannot be confirmed as memory is classified as NONE.

Official Ohata classification: A module qualifies as Memory S Grade when inspection confirms that it is gold-finger server or enterprise RAM with ECC/registered characteristics and high IC density. The grade applies to every qualifying module regardless of brand, model, capacity or DDR generation. Any module failing one or more essential S Grade requirements must be assigned to the appropriate lower grade according to its actual construction and condition.

Learn more about Ohata's RAM recycling classifications

RAM-S(Gold finer server RAM) Grade

RAM-A(Gold finer desktop and laptop RAM) Grade

RAM-B(shelded/silver edge/trimmed RAM) Grade

RAM-C(mix and damaged RAM) Grade

RAM-D(mix and damaged RAM) Grade