pcie 2.0 & pcie 6 or 8 pin power connector

[neiroatopelcc]

Since pcie 2.0 boards are supposed capable of delivering 300w to a x16 pcie2.0 slot, I don't really understand why a geforce 9800gx2 needs both a 6 and 8 pin power connector, or any other of the pcie 2.0 cards need any auxiliary power connectors for that matter - are they optional, and only needed on pcie 1.1 boards ? or are they mandatory, even if you have an x48 or 790i board?

 

[tjoepie]

dunno,... maybe because it doesn't work if you don't ;-)

 

[neiroatopelcc]

so you say, you're 100% it will not work without the connectors attached? or are you simply guessing?
And if they don't work, I wonder why not, cause after all the pcie slot should be able to provide more than sufficient power to feed even the fiercest card on the marked.

 

[MadHacker]

they may have 2 connectors to support backwards compatability
it will work in a PCIE16 v1 slot after all... and it doesn't supply as much power as the PCIE16 v2 spec.

 

[tjoepie]

I was just guessing, why else would they say you need it?

 

[neiroatopelcc]

okay, but the real question is, if it will operate normally without those two attached, in a pcie 2.0 capable motherboard? or if it'll squeak in that highpitch noise all genforce boards do when there's a problem with the auxiliary power? Anyone tried it? (I don't own a pcie 2.0 board or card, so I can't)