Rosewill 530 w

Rosewill are not very good psus..It will work untill it blows up and then you buy new components...
I would rather spend a few extra dollars on a decent supply like Corsair, Seasonic, PC Power & Cooling or Enermax cause that card will pull power!!
Hope this helps..JQ
 
Actually, most of them are good, the green, hive, capstone, fortress, tachyon series are all good psus.
With 530W, i guess it's the Rosewill Green Series RG530-S12, which has 41A on the +12v rail which is more than enough for the 7870, 7950 or even the 7970.
So it will work fine.