Best Power Supply 2026 — 80+ Certification & Wattage

A PSU is not a place to save money. Cheap power supplies fail catastrophically and fry your whole PC. Here's how to pick a reliable one.

Wattage: how much do you need?

**Safe rule**: System TDP + 30% headroom. RTX 3060 + i5-12400 = 200W TDP → 650W PSU. RTX 4080 + i9-14900K = 450W TDP → 850W PSU. RTX 4090 + i9-14900KS = 550W TDP → 1000W PSU. Better to oversized than undersized. Larger PSU runs cooler (longer lifespan).

Browse Power Supplies →Gaming PC Build Guide →

80+ Bronze vs Gold vs Platinum efficiency

**80+ Bronze**: 85–88% efficiency, cheaper ($60–80), acceptable heat. **80+ Gold**: 90%+ efficiency, $80–120, less heat, longer lifespan. **80+ Platinum**: 92%+ efficiency, $150+, rarely needed for home use. Gold is the sweet spot for builds over $800. Bronze is fine for budget builds.

Modular vs semi-modular vs non-modular

**Non-modular**: All cables hardwired, cheapest, messy case wiring. **Semi-modular**: Some cables detachable, $20 extra, cleaner. **Fully modular**: All cables detachable, best cable management, $30–50 extra.

Best budget PSU: Thermaltake Toughpower (~$80)

650W, 80+ Bronze, semi-modular. Reliable, good cable management. Most popular budget option.

Corsair RM650X → →Seasonic Focus GX-650 → →

Best mid-range: Corsair RM850x (~$120)

850W, 80+ Gold, fully modular, Corsair reputation. Perfect for high-end builds ($1500+).

Corsair RM850e → →Seasonic Focus GX-650 80+ Gold → →Corsair RM650x 650W Fully Modular → →

Frequently Asked Questions

Can I use a 10-year-old power supply?

No. Capacitors degrade over 5–7 years. Old PSUs fail suddenly and damage components. Replace if PSU is 7+ years old.

Is a 1200W PSU overkill for my RTX 4070 build?

Yes, but not bad. Oversized PSU runs cooler and lasts longer. You're paying $30 extra for 10% longer lifespan — acceptable trade.

Why is an Corsair RM750x better than a random brand?

Brand reputation, warranty, quality components (capacitors, cables). Cheap brands cut corners (worse components, shorter lifespan, 2-year warranty vs 10-year).

Best Power Supplies for Gaming PCs & Workstations