If you don't need boot screen. You can use a few ones.
or if you wait a lit bit to yosemite you can use gtx 750/ti
these ones don't have boot screen
or semipassive which means under 60ºC the fans don't move and upper 60ºC they start to spinning
There are kits you can put on the 8800GT.
We have a GT120 that has DVI and VGA.
Not much else around.