For that you have specifically check the pin connectors, hopefully you have a 20+4 connector in the mobo, if so your good to get any quality PSU from Antec, Corsair or Seasonic. I had an HP and it had a 6-pin connector replacing the 20-4 which is standard for most commercial PSU.
thanks for replying. will it matter if the mobo has a 6 pin? Will that restrict me from getting any good psus for the 5770 im trying to run? just checking. I do not actually know what my 530 has(most likely a 20+4 being a pretty old computer.) thanks!