I am wondering what this is, because it came with my case, and where do I connect it. I also have a question about my mobo. My mobo is an old one...made by Asus (P4B266-LM). I tried looking in their site for a manual but they don't have the specific two letters at the end. On my mobo there are two ATX12Vs. One says ATX12V and the other says ATX12VV. My old power supply was connected to the one that said ATX12VV. I bought a new power supply recently and should I connect to the ATX12VV or the other one.