It has every function as our motherboard just plus an an add on of usb 3.0. Now you all are probably thinking that you have to change your motherboard to use usb 3.0 and yeah, it is really fast(around 4 gb/sec) which now competes with the esata. If you are thinking of replacing your motherboard then I have one more thing for you which might save you a lot of money
Here is an evolutionary product! Yes! you all think that this is the usb 3.0 pcie card from gigabyte “heavy duty”. usb 3.0 PCIe card now this will save you a lot! It works great even I am going to order one and it can fit one any motherboard with pcie slot and it Sporting the popular NEC USB 3.0 chip . The extra juice is pulled from a pair of motherboard molex connectors that are joined to the card. Price is set at $53 at least on Brando, but you will likely find it on a few other online e-tailors as well.