Howdy Folks! I'm in the process of building out my very 1st rig!

Today, I purchased a new PSU (Corsair RM 750x) on the back of the power supply where you plug your cables in, I had a question about those ports.

The ones that are labeled "Peripheral & Sata" can I plug in another PCIe cable with two 6+2pin connector? ( Link to product: http://www.corsair.com/en-us/type-4-sleeved-black-pci-e-cable-with-pigtail-connector-and-capacitors-for-type-4-psu )

This rig will have a max of (3) RD570 GPUs with just the bare amount of hardware (Mobo,RAM, CPU, HDD) to run it.

Thanks in advance!

-N