500W modular Power Supply Module , hot plug, titanium (96%
efficiency) for tower servers. This 500W PSU comes with an adjusted
firmware for optimized fan control and reduced acoustic noise. The
fans are triggered later and slower, which helps improve the
overall acoustic behaviour of the tower servers. The PSU is
intended for tower servers only. Mixed configurations with
PYBPU503/ PY-PU503 within one system are not permitted due to
different firmware.