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PCI-E 2.0 300W Power Limitation?

post #1 of 4
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Is it true that no card will surpass 300W due to the slot's 300W limit?
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post #2 of 4
A PCI-Express x16 2.0 slot can deliver 150W

And FYI: 6-pin PCI-E power connector delivers up to 75W, whereas an 8-pin PCI-E power connector will do 150W
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post #3 of 4
I dont know if it was ever really confirmed but I remember from the initial GTX480 reviews, a few sites reported it's max power consumption over full load probably around 300W (Basically saying Nvidia lied about its power consumption). The 4870x2, GTX295, and 5790 are all very close too.

Hopefully Nvidia or AMD dont really need to exceed 300W, but I doubt that limitation bothers them, they will probably just require a specialized power supply.
Edited by BinaryDemon - 1/28/11 at 7:09am
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post #4 of 4
It is mostly that no one wants to surpass PCI-E 1.0 spec of 75 watts for the slot.

You could slap on 2x 8 pin power for +300 watts, but that is a massive amount of heat to dissipate and would have to be water cooled.
    
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