Quick Answer
A good 80 Plus Gold 650-850W lasts about seven to ten years in a daily-driver PC before its capacitors age enough to matter. The number on the box is wattage, not lifespan: a quality 650-850W unit running at 40-60% load and kept cool will outlast a cheap one of the same rating by years.
How long a power supply really lasts
Plan for seven to ten years of reliable service from a reputable Gold-rated PSU. Lifespan is driven by capacitor heat and load, not raw age: a 650-850W unit running a 200-300W gaming build sits in its efficiency sweet spot and barely stresses its components. Sustained high heat is the real enemy, so case airflow and ambient temperature matter. South African mains can swing and surge, so a surge-protected outlet protects the PSU far more than a higher wattage number does.
Signs it is time to replace, and how to size a new one
Replace a PSU when you see random reboots under load, coil whine that worsens, a fan that rattles, or it is simply past eight years in heavy use. When sizing a new one, take your GPU and CPU peak draw, add headroom, and land on a 650-850W 80 Plus Gold unit for a mid-to-upper build. Buying 200W more than you need wastes Rand without adding meaningful lifespan; a right-sized quality unit on a surge-protected outlet is the durable choice.
PSU off a surge-protected multiplug or a small line-interactive UPS; clean, stable power adds more years than any extra wattage on the spec sheet.
FAQ
How many years does a PC power supply last in SA?
Around seven to ten years for a quality 80 Plus Gold unit in daily use. Heat and unstable mains shorten that, so a surge-protected outlet and good case airflow are the best longevity investments.
Does a higher-wattage PSU last longer?
Not directly. A 650-850W unit running at half load lasts longest because it stays cool and efficient. Over-sizing far beyond your draw mostly wastes money rather than adding years.
What wattage do I need for a typical SA gaming PC?
A 650-850W 80 Plus Gold supply covers most mid-to-upper builds with a single GPU. Check your card's recommended figure, add roughly 150W of headroom, and avoid no-name units.
Compare 80 Plus Gold power supplies at Evetech sized to your build, and pair one with a surge-protected outlet for the longest reliable service.