Desktop PC

Desktop personal computers are assembled computing systems that combine multiple electronic components into a single functional unit designed for stationary office or home use. The CCI score reflects cradle-to-gate emissions through the point of completed assembly, representing the carbon intensity of bringing a typical desktop system to market before any operational use.

Material Composition Assumptions

The standard desktop PC assessment assumes a total system weight of 9.8 kg distributed across major component categories. The steel and aluminum chassis represents the largest material fraction at 4,200 grams or 43% of total weight, providing structural support and electromagnetic shielding for internal components. Printed circuit boards including the motherboard and expansion cards account for 1,800 grams or 18% of system mass, incorporating precious metals, rare earth elements, and complex semiconductor devices. The power supply unit contributes 1,500 grams or 15% of weight through transformer cores, capacitors, and switching electronics housed in metal enclosures. Plastic components including bezels, connectors, and internal mounting hardware total 1,200 grams representing 12% of system weight. Electronic components and internal cabling complete the remaining 1,100 grams or 12% through processors, memory modules, storage devices, and interconnect wiring.

Manufacturing Geography

The assessment uses China as the primary manufacturing region based on the concentration of global desktop PC production in Guangdong Province and the Yangtze River Delta economic zones. These regions account for more than 70% of worldwide electronics exports through established supply chain networks connecting semiconductor fabrication, component assembly, and final system integration facilities. The Chinese manufacturing grid intensity of 566 gCO2e/kWh reflects the coal-heavy electricity mix powering production facilities in these industrial areas, significantly influencing the carbon intensity of energy-intensive manufacturing processes including wafer fabrication, metal forming, and precision assembly operations.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
Europe (Germany)	380 gCO2e/kWh	365	-14%
United States	450 gCO2e/kWh	395	-7%
India	720 gCO2e/kWh	485	+14%
Nordic Countries	120 gCO2e/kWh	295	-31%
Australia	510 gCO2e/kWh	420	-1%

Provenance Override Guidance

1. Manufacturing facility location with specific grid emission factors for primary assembly operations and major component production sites
2. Detailed bill of materials specifying exact weights and material compositions for chassis, circuit boards, power supplies, and electronic components
3. Transportation data including shipping distances, modal splits, and logistics pathways from component suppliers to final assembly facilities
4. Process-specific energy consumption data for semiconductor fabrication, metal processing, plastic molding, and system integration activities
5. End-of-life material recovery rates and recycling infrastructure accessibility for the intended market region

Methodology Notes

• The CCI score represents cradle-to-gate carbon emissions for a complete desktop PC system excluding monitor, keyboard, mouse, and speakers
• Scope 1 emissions dominate through direct fuel combustion in metal processing, semiconductor fabrication, and component manufacturing operations
• Scope 2 emissions capture electricity consumption during energy-intensive production phases particularly wafer processing and precision assembly
• Scope 3 emissions account for raw material extraction, component transportation, and upstream supply chain impacts
• The functional unit assumes a typical business desktop configuration with mid-range performance specifications and standard component selections
• Operational use phase emissions are excluded from the manufacturing-focused CCI boundary
• Data gaps exist for emerging component technologies and regional variations in manufacturing process efficiency
• Recycling benefits and end-of-life material recovery are not credited against the manufacturing carbon footprint