be quiet! TFX Power 3 300 300W

A 300W unit with 80+ Gold efficiency certification and non-modular cabling. It uses the ATX form factor — confirm your case lists ATX support. 300W covers mainstream builds with a modest GPU. Skimping on the PSU is a false economy; better efficiency ratings usually mean better components and longer warranties.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Support and warranty service run through be quiet!, with terms that vary by region. Every published spec is tabulated below, and compatibility against your current part list is checked automatically. If this power supply is not quite the right fit, the category page lists close alternatives at similar prices for a quick side-by-side comparison.