He's using a older version of the 9600GT by Asus, I think, Which used to have the need for extra Power, I guess must be the first few revisions. They did get hot then and now more so ever.
Especially nowadays, when we sit and watch HD Videos and Movies , I think, the GPU's do get hot, older versions will certainly get hot.
The 57's have really very cool heatsinks and keep the cards really very cool. I'd be scared of buying a passive cooled card either way.
he finds his 9600 Big 'cos he has not seen the MARS II as yet....:)