The Enermax TriAthlor 550W power supply delivers good voltage regulation with clean DC outputs (low AC ripple) and is housed in a compact chassis that is only 140mm (5.5) deep. The TriAthlor 550W power supply is eco-friendly by meeting the new ErP Lot 6 standby efficiency criteria but achieves only 80Plus Bronze level efficiency under load. Under light to medium loads the power supply is quiet, but at the higher loads fan noise becomes noticeable."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips