If you bought the Intel Z77 chipset mainboard, one of the reasons you wanted it is because of embedded support of USB 3.0 in addition to other new features that are incorporated on board by the various manufacturers.
Unfortunately, the performance of USB 3.0 doesn’t seem to be on par or better than those using ASmedia chipset.
In fact, according to reports found in many forums, users have found that the speeds they achieved using an external USB enclosure to be far from expectation. For example, a sequential read usually gets around 220MB/s only garners 45MB/s when connected to the USB 3.0 port (intel z77) on the same motherboard.
Are you experiencing the same problems ? Discuss.