PSU catalog

The power supply unit (PSU) converts mains AC electricity into the regulated DC voltages (+12V, +5V, +3.3V) that every component in your PC depends on. While it may seem like a background player, a poor-quality PSU is one of the most dangerous components in a system — voltage ripple, inadequate headroom, and failed protection circuitry can damage or destroy a GPU, CPU, or storage drive. Investing in a reliable, properly-sized PSU is one of the best long-term decisions you can make for system stability and component longevity.

Key specs to understand: Wattage is your total power budget. Add the TDP of your CPU and GPU, then add 20–30% headroom for efficiency and future upgrades. A system with a 125W CPU and a 300W GPU needs at least a 550W unit, though a 650–750W provides comfortable headroom. 80 PLUS efficiency rating (White, Bronze, Gold, Platinum, Titanium) indicates how efficiently the PSU converts AC to DC — a Gold-rated unit wastes roughly 10% of drawn power as heat, while Titanium wastes under 5%. Higher efficiency means lower electricity costs over the PSU's lifetime. Modular design (fully modular, semi-modular, fixed) determines cable management flexibility — fully modular units let you attach only the cables you need, reducing clutter inside the case. Protection features — OVP (over-voltage), OCP (over-current), SCP (short-circuit) — automatically cut power in fault conditions, protecting connected hardware. Fan noise and the zero-RPM fan mode (common on premium units) allow silent operation under light loads.

Budget guide: Entry-level (under 1,500,000 ₫) — 550–650W Bronze or Gold units from reputable tier-B manufacturers cover budget gaming builds and office workstations with integrated or entry-level discrete graphics. Adequate protection circuits and stable rails make them safe for everyday use. Mid-range (1,500,000–3,000,000 ₫) — 750–850W Gold or Platinum fully modular units suit mid-range gaming rigs with power-hungry GPUs. Better capacitors, tighter voltage regulation, and quieter fans make these the sweet spot for most PC builders. High-end (above 3,000,000 ₫) — 1000W+ Platinum or Titanium units are designed for flagship GPU builds, overclocked systems, and professional workstations. Premium build quality, low ripple, and extended warranties justify the price for hardware that is expensive to replace.