PC components are generally more durable than their consumer electronics reputation suggests. Under normal conditions with reasonable temperatures and clean power, most components outlast their usefulness by several years. Understanding realistic lifespans helps with upgrade planning and with deciding whether a repair is worth doing.
CPU
CPUs are among the most durable components. Under normal use, they essentially do not wear out. The practical lifespan is determined by software requirements outpacing the hardware, not by the CPU failing. A well-maintained CPU from 2018 will still function perfectly in 2026 — it may just not be fast enough for current needs.
GPU
GPUs are more thermally stressed than CPUs due to their smaller coolers and higher sustained power draw. Under normal conditions: 5-10 years of reliable operation. The primary risk is thermal fatigue on solder joints from repeated heating and cooling cycles. Keep temperatures reasonable (below 85°C sustained) and they last well.
Motherboard
Capacitors are the weak point — they degrade with temperature and voltage stress over time. A quality motherboard kept below 80°C and supplied with clean power lasts 7-10+ years. Cheaper capacitors in budget boards fail sooner, particularly with generator power quality common in Nigeria.
RAM
RAM rarely fails under normal conditions. It is one of the most reliable components. Failure is usually infant (dies within the first few weeks) or from power damage. Expected lifespan under normal use: 10+ years.
SSDs
NVMe SSDs have a write endurance rating (TBW — terabytes written). Typical consumer SSDs are rated for 300-1200 TBW. For most users who write 50-100GB per day, this represents 8-25 years of rated endurance. NAND flash technology means SSDs do eventually wear, but the rated endurance is conservative.
PSU
PSUs are the most likely component to cause harm if they fail. Quality PSUs (80+ Gold/Platinum) typically include capacitors rated for 50,000+ hours at rated temperature. Under normal conditions: 7-10+ years. In Nigeria with power fluctuations, a quality PSU with good surge protection can still last this long if power delivery is managed well.