Where are you getting the 18mb/s number from? For internet connection, 54mb/s is plenty fast. You might benefit from the 300mb/s if you are connecting to other computers in your house and want to transfer large files.
hi gurduloo. i am getting it from our internet plan with our ISP. i do not wish to transfer large files etc. i am just concerned with the overall connection speed with browsing gaming etc.
also is there any particular speed advantage when it comes to usb 2.0 vs. pci?