PCI Express 6 pin to 8 pin Power Adapter Cable question

Hi started my new build yesterday but hit a hurdle in that my PSU does not have an 8 pin lead for the GPU. The GPU requires a 6 and 8 pin.

After doing a little research it looks like you can by an adaptor to convert a pci express 6 pin power lead to an 8 pin.

http://www.overclockers.co.uk/showproduct.php?prodid=CB...

I have also found 2x4-Pin Molex -> 8-Pin PCIe.

http://www.ebay.com/itm/2x4-Pin-Molex-8-Pin-PCIe-PSU-Sh...

Would one of these cables be ok to use? Would they damage the PSU or GPU at all? Would the GPU be getting the power that it requires? I don't want to risk it at all so if it's not going to do the job ill buy a new PSU.


My PSU is a Corsair HX520W
http://www.overclockersclub.com/reviews/corsair_hx520w/

and the GPU I am using is Asus ATI Radeon HD 6950 DirectCU II 2048MB GDDR5
http://www.overclockers.co.uk/showpr...-254-AS&tool=3

Thanks for any help

Matt