65c isnt that dangerous. Ive seen cards hit 90c without damage. Anything below 70c is definitely safe, below 60c is quite good and below 50 is a beautiful thing. So I dont think your temp* is that bad......I would however have another look at that PSU, especially if running that C2D. I would recommend you invest in another PSU before you have more issues. I believe the Enermax unit in my sig would be up to the job. And you would most likely see a drop in temps as well.
You have your card listed twice.... are you running crossfire? If so maybe that Enermax wouldnt handle that but a stronger version would.
refering to load temps*
Biostar TP45HP--E8400 (450*9 1.3v) Zalman CNPS9700--2x2GB Mushkin 6400 @ 900 Mhz 184.108.40.206--SATA2 500Gb 32mb SATA 160Gb 16mb--2x HIS 4850 ICEQ4-- Coolermaster HAF 932--Corsair TX750W--Vista Ultimate x64