Your build utilizes 438 watts at full load (100%) with 10% capacitor aging (fairly new power supply). So you have enough wattage to power your build. In the future be careful when choosing a power supply, Rosewill is a mixed brand in my opinion. They have some outstanding power supplies and others that are not so good. Anyways the one you have selected is very good.
If you wish to calculate your wattage with any other additions use this tool:http://www.extreme.outervision.com/PSUEngine
* I calculated your wattage without inputting any fans, so you may want to add that in. Anyways fans barely draw any power.