Description
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DDR4 (Double Data Rate 4) operating at 3200MHz represents a modern generation of high-density volatile memory commonly recovered from decommissioned desktops, laptops, and enterprise servers. For e-waste recyclers, DDR4 modules are classified as high-grade printed circuit boards (PCBs) and are highly sought after for their dense integrated circuits (ICs) and precious metal plating.
Because DDR4 is still actively used in the secondary market, incoming batches must often be sorted to separate working modules for resale/refurbishment from end-of-life modules destined for material recovery.
Physical Specifications (For Sorting & Weighing)
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Form Factors:
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DIMM (Desktop/Server): 288 gold-plated pins, ~133mm in length.
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SO-DIMM (Laptop/Mini PC): 260 gold-plated pins, ~69mm in length.
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Average Weight: 15–20 grams per bare module (DIMM). Modules equipped with aluminum heat spreaders will weigh significantly more (up to 40-50 grams) and require an extra processing step to separate the aluminum from the PCB.
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Visual Identifiers: Look for the notch located slightly past the center of the pin edge (differs from DDR3). Often features black or green solder masks.
Material Composition & Recovery Value
DDR4 RAM modules are considered premium e-scrap due to the high concentration of valuable materials packed into a small footprint.
Component / Area Primary Material Scrap & Recovery Value Edge Contacts (“Fingers”) Hard Gold over Nickel High. The 288/260 pins are plated with high-purity gold to prevent corrosion, yielding the highest immediate return in the chemical stripping process. Integrated Circuits (BGA Chips) Silicon, Gold (Bonding Wires), Epoxy High. Modern DDR4 chips use microscopic gold bonding wires to connect the silicon die to the chip substrate. Multi-layer PCB Copper, FR4 (Fiberglass/Epoxy) Medium. The internal layers of the circuit board contain high-grade copper routing that is recovered during smelting. Surface Mounts (Capacitors/Resistors) Palladium, Silver, Tin/Lead Solder Medium. Micro-components contain trace amounts of palladium and silver, recovered during the base-metal refining phase. Heat Spreaders (If attached) Extruded Aluminum, Thermal Paste Low/Base. Must be mechanically removed and sorted into clean aluminum scrap bins prior to shredding the PCB. -
