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Our delivery speed in business days significantly surpasses the market's estimated delivery date.
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[What You'll Receive] 12.2 LBS 3G CPU.
Using these images and Gemini AI to estimate the gold content, we compared it with DDR2 desktop memory. The results are:
12.2 LBS CPU (with metal protective casing)
= 12.2 * 29 / 45 = 7.86 LBS (without metal protective casing)
= DDR2 memory 7.86 / 1.5 = 5.24 LBS RAM.
Because AI estimations have a certain margin of error, we cannot guarantee their accuracy. The same AI may also give different conclusions. The above information is for reference only and we hope it is helpful.
# Precious Metal Analysis: DDR2 RAM vs. Qualcomm QSC6055 RF Module
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## 1. Executive Summary
This document provides a comparative analysis of the gold yield (grade and absolute content) between two types of high-grade electronic waste (e-waste):
1. **Elpida DDR2 2GB Desktop RAM** (Blue PCB, weighing approximately **16g** each)
2. **Qualcomm QSC6055 RF Communication Modules** (Green PCB, weighing approximately **7.25g** each)
While both components are categorized as premium-grade materials in the precious metal recovery (refining) sector, they feature distinct gold distribution patterns and plating technologies.
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## 2. Technical Characteristics & Gold Distribution
### A. Elpida DDR2 Desktop RAM (16g)
The primary sources of gold in this DDR2 memory module are:
* **Electroplated "Hard Gold" Fingers:** Manufactured during an era (DDR2) when connector contacts were heavily plated with hard gold (typically $0.5 - 0.76\,\mu\text{m}$ thickness) to withstand repeated insertion wear. This layer yields highly recoverable flake gold.
* **IC Bonding Wires:** The module hosts 16 Elpida DRAM chips (8 on each side). These older-generation chips utilize thicker high-purity gold bonding wires ($99.99\%\,\text{Au}$) compared to modern, finer-pitch chips.
### B. Qualcomm QSC6055 RF Module (7.25g)
Despite its smaller size, this communication board is highly integrated:
* **ENIG (Electroless Nickel Immersion Gold) Pads:** The extensive gold-plated testing grids and ground pads on the back of the board use the ENIG process. This produces a visually striking gold surface, but the layer is exceptionally thin (typically $0.05\,\mu\text{m}$).
* **Gold-Plated Connectors:** The board features a high-density board-to-board connector and two U.FL/IPEX miniature RF antenna jacks, both utilizing gold-plated contact pins.
* **RF IC Bonding Wires:** The Qualcomm QSC6055 CDMA/EV-DO SOC and its adjacent flash/RF chips feature dense, high-purity gold wire bonds designed to minimize signal impedance.
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## 3. Gold Yield Projections: "Equal Weight" Comparison (Per 1 Kilogram)
When assessing e-waste value on a bulk scale, the **gold grade (ppm or grams per metric ton)** is the standard metric. Below is a projection comparing **1 kg** of DDR2 RAM against **1 kg** of Qualcomm QSC6055 RF Modules.
### Grade Comparison Table (Per 1 kg of Scrap)
| Metric | DDR2 RAM (1 kg / ~62 units) | Qualcomm RF Modules (1 kg / ~138 units) |
| :--- | :--- | :--- |
| **Average Unit Weight** | 16 grams | 7.25 grams |
| **Est. Gold Yield (Per Unit)** | 20 – 30 mg | 6 – 9 mg |
| **Est. Gold Yield (Per 1 kg)** | **1.24 – 1.86 g** | **0.83 – 1.24 g** |
| **Projected Grade (PPM)** | **1,240 – 1,860 g/t** | **830 – 1,240 g/t** |
| **Relative Gold Value Ratio** | **1.5** | **1.0** |
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## 4. Key Findings & Chemical Refining Insights
> **Conclusion: On an equal-weight basis, the DDR2 RAM yields approximately 1.5 times (50% more) gold compared to the Qualcomm RF modules.**
### Why does the RAM module outperform the RF module in gold density?
1. **Plating Thickness (Hard Gold vs. ENIG):** The gold fingers on the RAM module feature **electroplated hard gold** designed for friction resistance. It is roughly **10 times thicker** than the **ENIG (Immersion Gold)** used on the Qualcomm board's test pads. Although the RF module has more visible gold-colored surface area, the actual microscopic volume of gold on those pads is incredibly low.
2. **"Dead Weight" Dilution (PCB and Soldering):** The Qualcomm RF module is packed with non-precious materials. It contains a high ratio of green solder mask, copper tracing, fiberglass (FR-4), heavy solder joints, and non-gold-bearing ceramic capacitors/inductors. This "dead weight" dilutes the overall gold grade per kilogram.
3. **IC Density Per Kilogram:** One kilogram of RAM contains approximately **992 individual IC chips** (each containing gold wire bonds). Conversely, one kilogram of RF modules contains only about **276 major IC chips** (two per board). The sheer volume of gold-wire-bearing ICs in a bulk load of RAM provides a superior yield.
[Working Condition] Sold for gold recover scrap.
[Warranty (days)] No warranty.
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[Attention please] We kindly request that you read the item's title and description carefully and review all provided pictures before making your purchase. Please be aware that certain details in the "item specifics" section may be automatically generated by the market, and we cannot guarantee their accuracy.
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SHIPPING & PICKUP
•Parcel: Your order will be shipped with a tracking number.
•Economy Shipping (Letter Mail): This option does not include a tracking number.
•Delivery speed may vary due to factors such as customs processing, distance, holidays, and more. We reserve the right to adjust shipping options and carriers as needed.
•Local Pickup: We welcome online payment or payment upon pickup. Please collect your order within 7 days after the auction closes; otherwise, we may recycle or resell it, with a 15% restocking fee applied.
•Pickup Hours: Our pickup location is open from Monday to Friday, 9:30 am to 5:00 pm (no weekend pickup service), and is conveniently located at SW Marine Dr, Vancouver, near the Marine Dr SkyTrain station.
•It is the buyer's responsibility to ensure that the shipping address provided on the market is accurate. Buyers must promptly collect parcels as instructed by the carrier to avoid any additional charges or fees. We reserve the right to charge extra shipping fees for remote locations; please request a quote before bidding. Additionally, buyers can arrange shipments using their own shipping accounts, but we will charge handling and material fees (minimum 15 CAD). Buyers must create waybills and send them to us. We reserve the right to decline shipping to certain locations.
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PAYMENT
•Please make timely payments to avoid automatic unpaid strikes from the market.
•Contact us (do not make payment before receiving our confirmation) for any service exceptions or address changes. Failure to do so may result in additional charges or fees.
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WARRANTY & RETURN
•Abuse of the marketplace return policy is not allowed and is unacceptable. Please select the correct reason for your return. Any unreasonable returns will be reported to market customer service and may lead to the suspension of your account.
•We record serial numbers or IDs when shipping orders. Please provide clear pictures of the labels on products when initiating a return and ensure that the items are returned in their original box with proper packaging to avoid return refusal.
•If warranty information is not explicitly mentioned, a 30-day warranty applies to "used" and "new" items from the date of delivery. Parts or items listed as "not working" are not covered under warranty.
•In cases of parcel damage during delivery, we will file claims with the courier. Please respond promptly to emails or calls from the courier to avoid return refusal. If you disagree with this policy, we recommend refraining from bidding.
•We accept returns through postal services only (Canada Post, USPS, and other countries' postal services). We do not accept any COD (collect on delivery) returns or UPS, DHL, FedEx returns. Buyers must provide the dimensions and weight of return parcels, as well as their email addresses on PayPal.
•Please label the return parcel as "Return Goods" or inquire with the courier to ensure that customs or taxes are not charged. Any customs or tax charges incurred will be the buyer's responsibility.
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PLEASE NOTE
•If cables, adapters, or other accessories/parts are not mentioned in the description or shown in the pictures, they may not be included. We specialize in hardware sales, and if software, user information, passwords, or licenses are not provided in listing, it means these may not be included. It is the buyer's responsibility to install software, recover passwords, register users, or obtain licenses.
•If you have any questions, please contact us via the market message center only. We always strive to respond to your inquiries within 0-48 hours."
SF03-SKU: # CPU Scrap (black bin) 33 South side, Wall (5 boxes for one lot 12.2 LBS)