Radeon HD 5870 Six with 6 display outputs, prices, performance

[crystogod]

I'm sorry but that's not how it works. Plug the intake of a turbo, does it start pulling air in from the outlet? No, it simply hits the choke point. It's the same for this type of fan - they operate on the same physical principle. They could be intakes if they are ducted to the inlet side of the fan, but just having two holes there would make them outlets.

Well my arugment was not whether or not they defyed the laws of this type of fans physics, just that when the top opening was blocked that through some manner or ducting they would act as a draw in point for fresh air, im not dissmissing the fact that the centrifugal blower only can draw air from the top, just that when it was blocked some manner would allow it to draw from those ports

The intake vent on the back end serves as the main source of intake air when the card is in an SLI configuration. When run in a multi GPU setup, these cards are incredibly close to each other, so another avenue for air intake had to be used.

You can see here that the fan is shrouded to prevent it from throwing the air in all directions and out of the intake, i assume the 5870 is the same, you can see the gap between the blower and chassis which is probley the draw point where the lip is cut out to allow intake... soo if you put ur finger in the intake and felt upwards there would be a small gap to feed air from the intake of the blower.. if not the fan shroud and the top chassis are two seperate pieces that dont even touch.. i assume they are air "intake" and not exhaust



You can see here the same principle, the shroud for the radial fan hides the fan, but i bet there is just enough room to force those inlets to draw if the top becomes blocked