Hi, I recently built a desktop and have a question on plugging in 8 pin PCIe cable to 6 pin connector. So, I have EVGA 600B PSU, MSI Radeon R9 270 GPU and ASRock z97 Extreme 4 Mobo. My PSU has 6+2 pin PCIe cable and my GPU has 6 pin connector, and right now, I've just plugged in 6 pin part of the PCIe cable into GPU with extra 2 pins pushed out (dangling around) to the side. However, my PSU's manual says "do not attempt to plug an 8 pin PCIe cable into a 6 pin connector without first detaching the 2 extra pins". I am confused in that if I had to physically cut or pull out 2 extra pins before I plugged in the PCIe cable to 6 pin connector? Please help, thank you.