One HUGE problem with the custom coolers that dont vent the air out of the case; its going to become VERY varm inside the case. I have a 4870 in testing right now, and if the hot air werent vented out, I am afraid it would become dangerously warm in there. My case has good cooling, better then most cases.

It is not a problem keeping the 4870 cards at a good temp with the stock cooler, the problem is at about 45% fan speed, its too noisy for some ppl. At that speed the gpu temp reaches about 70 degrees C in a hot summer room playing games. Idles at about 50+ degress C.

So in short I am very sceptical to cutsom coolers that dont vent the air, same goes for any other latest gen gfx cards.

JH_man