I have a brand new, still-in-the-box, still-wrapped-in-plastic Antec 550W Power supply.

Some of the features:

1. Modular cables, so you only plug in what you need and keep your computer less cluttered
2. nVidia SLI ready
3. 120mm fan runs 50% quieter than standard fans

Full model is Antec TruePower New 550, TP-550.

Full specs are available here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371020&Tpk=antec%20truepower%20550

I'M SELLING FOR $50 BELOW MSRP AND $20 BELOW THE NEWEGG PRICE.

Email if interested.