Both the Gigabyte and MSI GTX 970's actually require 1x 8pin and 1x 6pin. However, this should not be an issue at all. The MSI GTX 970 comes with a 6pin to 8pin power adapter, and the Gigabyte GTX 970 comes with a 2x Molex to 8pin adapter and a 2x Molex to 6pin adapter. You are also able to find 6pin to 8pin adapters for sale at most computer shops, as well as on Amazon, Ebay, etcetera.