Codri,
In an effort to help, we are wondering if you've enabled "turbo mode"
http://www.caldigit.com/KB/index.asp?KBID=25&viewlocale=1
You're welcome to call us for support, also, so that we can gather more information to solve your issue.
Thanks.
Jon Schilling | Director of Business Development
CalDigit Inc
phone 714-572-9889 X234
fax 714-572-9881
web www.caldigit.com
email jons@caldigit.com
skype cgijon
office 1941 Miraloma Ave. #B Placentia, CA 92870