Power Supplies

ATX and SFX Power Supplies from Thermaltake, Corsair, Cooler Master, and MSI

Power supplies convert wall AC into clean, stable DC power for every component in a desktop system, and an undersized or low-quality unit is the most common cause of random shutdowns, coil whine, and premature hardware failure. Units from Thermaltake, Corsair, Cooler Master, and MSI span 500W budget builds through 1200W+ enthusiast rigs with 80 Plus Bronze, Gold, and Platinum efficiency ratings. Browse all component categories in the full PC Components collection.

Power Supplies for Every Build

• Budget office and HTPC builds — 500W to 600W 80 Plus Bronze units deliver reliable power for integrated graphics and low-TDP processors at accessible prices
• Mid-range gaming desktops — 650W to 750W 80 Plus Gold units with modular cabling provide clean power for RTX 4070-class GPUs and modern Ryzen/Core CPUs
• Enthusiast and high-end gaming — 850W to 1000W fully modular PSUs with native 12VHPWR connectors handle RTX 4080/4090 power demands with headroom for overclocking
• Small form factor builds — SFX and SFX-L units from Corsair and Cooler Master fit compact ITX cases while delivering up to 850W of stable power
• Workstation and content creation rigs — 1000W+ Platinum-rated units with multiple EPS connectors support high-core-count CPUs and professional GPUs under sustained load

Choosing the Right Power Supply

Three factors define a power supply purchase: wattage, efficiency rating, and modularity. Wattage must exceed the combined peak draw of all components with at least 20% headroom for stable operation and future upgrades. The 80 Plus rating (Bronze, Gold, Platinum, Titanium) indicates efficiency at converting AC to DC, with higher ratings wasting less energy as heat and reducing electricity costs over the life of the unit. Fully modular designs allow unused cables to be removed, improving case airflow and simplifying cable management.

80 Plus Efficiency Ratings

80 Plus Bronze operates at roughly 82-85% efficiency under typical loads. Gold reaches 87-90%, reducing heat output and energy waste. Platinum hits 90-94%, making it the preferred choice for workstations and always-on systems where electricity costs compound over years. Titanium exceeds 94% but commands a significant price premium. For most gaming builds, Gold provides the best balance of efficiency and cost. For systems that run 24/7 or draw high sustained loads, Platinum pays for itself through reduced power bills.

Complete Your Build

• Motherboards — ATX or Micro-ATX boards with matching EPS and ATX power headers
• Graphics Cards — GPU power draw determines minimum PSU wattage requirements
• Computer Cases — ATX cases for standard PSUs, ITX cases for SFX units
• Cooling & Fans — case fans and CPU coolers to manage thermal output
• Surge Protectors — protect your PSU and components from power surges and spikes