We need more information here, can you give us link(s) which describes your PSU?
I haven't heard that brand before...
http://www.amazon.com/Mbp550-hs-Autoswitching-Certified-Warranty-Computer/dp/B00SN72O10
Is that your PSU?
Well, basically yes, you can run that card with that PSU, BUT... Note that your PSU is more likely a low end PSU. I should remind you that do not cheap out on PSU, it's like a heart inside your body.
Get a quality PSU like Antec, Corsair, OCZ.