CoolMax CA-400 400W

A 400W unit with 80+ efficiency certification and non-modular cabling. 400W covers mainstream builds with a modest GPU. It uses the ATX form factor — confirm your case lists ATX support. A dependable power supply protects everything downstream, and efficiency tiers are a decent proxy for overall build quality.

Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and compare current power supply prices across retailers. CoolMax backs the product through its standard warranty channels; check the listing for region-specific terms. Every published spec is tabulated below, and compatibility against your current part list is checked automatically.