just to add to my orignial post
CPU: i5 4697K
RAM: 8gig DDR3
Motherboard: ASUS Z97-K
OS: Windows 7 64bit
Ports and speed:
usb 3.0 back - same results as aboev (40 MB/s write speed)
usb 2.0 back - 20MB/s write speed
usb 3.0 front - same results as aboev (40 MB/s write speed)