Hi Tech Legion posted a review on the Antec TP-550 Power Supply

I would hope that you would agree with me that it is important to have a dependable power supply, especially one that can give you enough power to let you perform your needs and wants on your computer. I know people out there that don't even play any games, that would just use the computer for e-mails, financing, and occasional surfing on the internet. If this classifies you as that type of person, it is still good to have a power supply that is capable of keeping your computer running under loads of stress from data. If you don't have sufficient power for these needs, it could lead to computer malfunctions, such as being unresponsive, and no one would enjoy that.

Antec TP-550 Power Supply Review