For cards that run very hot it doesn't seem extremely unusual for fans to run that high, but it's probably not healthy for cards to run hot enough long enough for the fans to be running at such high speeds.
As an aside I would just recommend avoiding the GTX465. I haven't heard of anybody being able to mod it into a GTX470, and the GTX465 was always a dog of a card. I would recommend a GTX560 Ti or GTX570 as a better option. A HD6870 or HD6950 are other options from the AMD side as well that are good options in the same performance category.