2 PCI-Express 6 pin connectors required for SLI?

[kudukudu]

I notice that a lot of power suppplies which are SLI certified only have 1 PCI-Express 6 pin connector. Is it necessary to pruchase a power supply with 2 PCI-Express 6 pin connectors if you want a system that can run 2 power hungry 6800GTs?

If yes, it seems strange that supposedly high end SLI power supplies like the Antec TruePower II 550 and Seasonic S12-500 only offer 1 PCI-Express 6 pin connector.

For example, see this Comparison of power supply specifications

 

[cronic]

pc power and cooling sli 510 has 2 sli power connectors and is AWESOME!

 

[Bona Fide]

My TPII-550 has two PCIe connectors. I have no idea what you're talking about

 

[kudukudu]

Okay

just found this on antec site. it looks like 480 and up and 2 pci-e connectors:

http://www.antec.com/pdf/PSU_comparisontable.pdf