Board teardowns
Pick the board in front of you. Each page maps where the precious metal actually sits, then gives you an ordered strip list with tools and temperatures.
Desktop motherboardATX / mATX · 244 × 200 mm · 0.5–0.9 kg
Mid grade — $3.15–10/lb depending on socket eraServer motherboardMulti-socket · 330 × 244 mm · 1.5–3 kg
High grade — $4.90–10/lb; the best common board you'll meetCell phone boardVery dense multilayer · 60 × 30 mm · 15–30 g
High grade — $20.50/lb, the densest gold-per-gram in consumer e-wastePower supply boardATX / SMPS · 150 × 100 mm
Low grade — $0.60/lb board, but the parts on it beat the boardTelecom line cardRack card · 233 × 160 mm · thick multilayer
High grade — $10/lb, and the harvestable parts are far richerConsumer board (TV, DVD, appliance)Single or double sided · often phenolic
Low grade — $0.60/lb. Mostly a lesson in what not to bother with.
Mid grade — $3.15–10/lb depending on socket eraServer motherboardMulti-socket · 330 × 244 mm · 1.5–3 kg
High grade — $4.90–10/lb; the best common board you'll meetCell phone boardVery dense multilayer · 60 × 30 mm · 15–30 g
High grade — $20.50/lb, the densest gold-per-gram in consumer e-wastePower supply boardATX / SMPS · 150 × 100 mm
Low grade — $0.60/lb board, but the parts on it beat the boardTelecom line cardRack card · 233 × 160 mm · thick multilayer
High grade — $10/lb, and the harvestable parts are far richerConsumer board (TV, DVD, appliance)Single or double sided · often phenolic
Low grade — $0.60/lb. Mostly a lesson in what not to bother with.