Hello, I have ordered sapphire 280x tri-x but apparently I don't have one of the 6-to-8 pci-e cables plugged on the PSU. So I have only 6 pin and 6+2 pin PCI-e cables but the card requires 2 x 8 pin PCI-e cables. I have checked and they sell genuine 6-to-8 PCI-e cable for 25$ which is too much, I mean the psu itself costs around 100$. Is there another way to have 8 pin PCI-e with the current cables I possess? For example I see lots of molex cables in my case.