You should be fine with your enermax. The specs on the label suggest it will power your new system easily. But I recommend you get a canned air solvent and clean up all the fans in your case if you haven't done so in awhile. Fry's sells 3 packs for about $8.99. I use "perfect duster" on my ps and cpu heatsink fan every 6 months.
thanks i'll go to best buy one day and pick up some and clean out my case before i install the i7