BitFenix Whisper M 550W

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

Use the PlanMyPC system builder to verify it works alongside your other components. Support and warranty service run through BitFenix, with terms that vary by region. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build. The category page surfaces comparable models near the same price, which makes shortlisting against this power supply straightforward.