StarTech ATX2PW400PRO 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. Skimping on the PSU is a false economy; better efficiency ratings usually mean better components and longer warranties.

PlanMyPC's builder flags compatibility problems with the rest of your parts automatically. StarTech backs the product through its standard warranty channels; check the listing for region-specific terms. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked. 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.