I am currently looking to use a gpu that requires using dual 6+2 but there arent enough 6+2 cables on the psu I wonder if there is some cables which I can use and have a capacitor like the stock ones? or if there it makes a difference to use ones without capacitors

Hello PontiacGTX, and welcome to the forums! The smallest G2 we currently sell is the 550, and this has 2 6+2 connectors; you would, however, need to leave the 6 pin loose. If you have other questions, we will need to know exactly which unit you're using and which graphics card it will be powering. 

The 1300w G2 comes with 6 6+2 cables.

You're trying to power 4 cards?