I've had this keyboard for about a year now and have always used it through a usb 2.0 port with an adapter it comes with because I cant see the difference between it and the usb 3.0 port. It seems to do the exact same thing. I've even seen a few notifications when you install it that say it doesn't work right in 2.0 but I downloaded a few software programs and tested it as rated for usb 2.0. I think it's a scam. Or a lie or something all the features work. I am worried though about the polling rate being 8k in a usb 2.0 slot. I am aware that usb 2.0 supports that polling rate? 8k?