PCIe to Molex Connector

I am sure this has been asked before i have searched but not really found an answer. I have a new fan on my graphics card which has a molex male connector my mac does seem to have a connector for these,
Is there a way to use the 2nd PCIe 6 pin PSU on the board to feed power to the fan ( i am aware its 12V only)
Or is it best to split the ones on the CD-Drives and trail to cable down?
Cheers

Most of the articles I read on AYM commented on Artic copper kit
ATI Radeon
HD 4870/4850/4830
38xx , 36xx series
2600, 2400
X1950, X1900
X1800, X1650
X1600, X1550
X1300 series
http://www.arctic-cooling.com/catalog/productinfo.php?cPath=2&mID=105
http://www.arctic-cooling.com/catalog/main.php?cPath=2
Best guide I can think of. Routing power from lower optical bay is possible going behind, but I haven't gone that route. As for ability and safety of using a PCIe solution...?
http://www.xlr8yourmac.com/Graphics/8800GTAcceleroS1/8800GTAcceleroS1R2.html

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