Antec SmartPower 300W - Enough for overclocked t-bred B?

[Naruto]

I have an antec smartpower 300W, will that be enough power for a 2200MHz + overclocked t-bred B? Thanks.

 

[human2k]

Is it the new series? On the lable does it say 3.3v+5v = 220W? If it does then your good to go.

 

[Naruto]

Not sure, my bro has it up in college. It is the Antec Model 303XP that has the 12 volt P4 connector. Well I have 3 antec PSU, the smartpower 300W, a newer looking smartpower 300W, and a smartpower 350W, I geuss I can swap them around.

 

[Naruto]

I just checked the 300W PSU in my newer SLK1600, it has a fancier label than my older one and its model number is SLS300S. I also checked for that combined wattage. Didn't have time to take it out, so part of the case blocked the text. It said something (the blocked part)V + 3.3V combined wattage = 220 Watt. So i'm geussing that blocked part was the 5volt. So what makes this a better power supply than the older smart power 300W?