Question PCI-E Y-Adapters

[Titanion]

I have read some informative old posts, but I have some questions.

Fairly new Antec TP3 650W PSU pulled from a rarely used single GPU system.

It has two seperate PCI-E cables, one 6 and one 6+2.

I want to Crossfire two HD 5850s, and both require two 6- pin plugs.

Have a 6 to 6x2 adapter and a 6+2 to 6+2x2 adapter.

Is it a bad idea to split the power from the two lines. If the 6+2 provides 150 W and the 6-pin 75W, if you are using two splitters, is it a bad idea to split both adapters and send each end to a different card.

This seems like a bad idea. I bet if the two extra pins are dangling because it only take 6 pins, only 75W is being drawn.

What is the best way to power these cards with this Antec 650W?

Are molex adapters better? I did not think so.

One line with an adapter dedicated to each card must be the best option.

 

[Lutfij]

Best include a picture of the adapters.

+ thumb rule with building computers, if your PSU lacks the necessary connectors for your components, it shouldn't be used. how old is the PSU? My vote is to get a new PSU.

 

[Titanion]

If the 6+2 provides 150w, split that and direct it to one card. Put the remaining 6-pin cable into the other card directly, 75W, but use a molex adapter for the orher. This just came to me. Does it make sense? Or can the 6-pin cable handle a draw of 150W?