WD MyPassport Essential SE does not perform well for me

i just bought WD my passport Essential SE 1 TB USB3.0
i connected it to my hp pavilion dv6 6121tx usb3 port. but it say that your device can perform faster. What is this ??? 
i copied some files to and from my new hdd. But the speed is only around 35 MBPS (both read and write). What should i do ?? 
i updated all the drivers and formated all the contents in the hdd preloaded
but still the speed is same. i got the same speed when i connected to usb2 port. so no difference in the speed of usb 2 and usb 3 port …:shock: tell me a suggetion. i came to know that this hdd can read more than 80MBPS and write at 60MBPS… but i did not get this 

Reinstall the USB 3.0 drivers for your computer, see the link below:


i tried this and no change. still it has only usb 2 speed :cry: