what do you mean by heatsink and fan combo?
just take a fan and put it somewhere to cool it down. I have the same card, and same cpu but not overclocked, but very little room on my super 7 motherboard. I took my chassis fan and put it directly behind the v3 so that it gets cold from the back and goes through. This might not be as good as a fan on the heatsink, but i had no room as my ethernet card is in the adjacent pci slot.
a wise man once stated, "a man whose thoughts are of 22-bit, will think equally clear and precise if not faster, than a man who must sacrifice speed and precision over clarity at 32-bit."
(no offense.....alright, just a little)