FSP Group Dagger Pro 550W

A 550W unit with 80+ Gold efficiency certification and full cabling. 550W covers mainstream builds with a modest GPU. It uses the SFX form factor — confirm your case lists SFX support. Power supplies are the wrong place to cut corners — efficiency certification correlates with build quality and warranty length.

At $141.10 it sits in the high-end power supply bracket. PlanMyPC's builder flags compatibility problems automatically and tracks the latest power supply deals from multiple stores. Support and warranty service run through FSP, with terms that vary by region. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.