Molex cables

Hi i need to create more molex cables out of one so i cn create a 6pin i know this is possible but will lots of connections affect the performance of my pc the 6 pin will be going into a gtx260 i already have one 6pin but that ws created out of my two original molexs from my psu.
So wnts i have finally got my connections sorted out will lots of connections affect the performance of my cmptr

Here is one possible solution:

http://www.xpcgear.com/6pinpciexpress.html

Your GTX260 should have come with a couple of adapters.

The big problem is going to be, as mindless said, the capacity of your PSU. If your PSU does not have any PCI-e cables, it is an old and possibly obsolete unit.