PC Power Supplies

Wattage: Matching Power to Your Build

Your PC power supply is the foundation every other component depends on. Whether you're building a gaming rig, a content creation workstation, or a high-performance desktop, choosing the right PSU means choosing stable, clean power delivery that keeps your system running reliably under load. Selecting the right wattage is the most important decision when choosing a power supply for your PC — your PSU needs to comfortably cover the combined power draw of your CPU, GPU, storage, and other components, with enough headroom for peak loads. As a general guide:

• Mainstream gaming builds: Mid-range GPUs typically run well in the 650W to 850W range.
• High-performance builds: Flagship GPUs or multiple storage drives benefit from 850W to 1000W or more.
• Workstations and overclocked systems: May require 1000W and above for consistent, stable output.

Efficiency Ratings and Why They Matter

Power supply efficiency is rated under the 80 PLUS and Cybenetics certification programs, ranging from Bronze, Silver, Gold, Platinum, Titanium and Diamond. Higher certification tiers mean less energy is wasted as heat, which translates to lower electricity costs over time and a cooler, quieter system. CORSAIR PSUs span multiple efficiency tiers, so you can choose the performance-to-value balance that fits your build goals.

Modular, Semi-Modular, or Non-Modular

Cable management has a direct impact on airflow and build aesthetics. CORSAIR modular power supplies come in three cable configurations:

• Fully modular: All cables detach, so you only connect what you need. Best for clean builds and cases with cable management channels.
• Semi-modular: Essential cables are fixed; optional cables detach. A practical middle ground for most builds.
• Non-modular: All cables are attached. Works well when space and aesthetics are less of a priority.

Form Factor and Connector Compatibility

Most desktop builds use ATX form factor PSUs — the standard size compatible with the majority of mid-tower and full-tower cases. Compact builds using small form factor cases may require SFX or SFX-L units. Check your case specifications before selecting a PSU. For modern high-end GPUs, look for PSUs that include the 12V-2X6 connector or come with an appropriate adapter cable.

Browse the full CORSAIR PSU range to find the right power supply for your PC build, with options at every wattage and efficiency level.