I had a simillar setup (gtx480 and pa120.2).The pa120.2 was reciving hot air from the gtx480 and I got bad temps. Once the pa120.2 was removed and joint the two loops to the gtx480 I got good results. The Gtx480 can handle more than I thought. Now its cooling an overclocked QX6850 and two overclocked 8800 ultras.
Oh yes, I did not drill my tj07 to fix the gtx480 existing holes fits it perfectly.good luck