What psu do i need for a dell optiplex 790 mt

I recently bought a dell optiplex 790 mini tower and i plan to use it as a budget gaming pc , i realized in order to install a gpu ill need to replace the psu , the problem is i dont know which one to get , is this one ok : https://www.ebay.com/itm/EVGA-B1-100-B1-0700-K1-80-BRONZE-700W-Computer-PSU-Power-Supply/232690893164?hash=item362d75416c%3Ag%3A~T4AAOSw3dtaoMo0 ? If not could someone give me a link to a psu that will fit in this case that has a 6 pin connector , im looking for a 650-700w just to be safe , thanks.