Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some things are not what they seem to be!

This promising 6 port USB card caused my machine to "hang" because of the substantial overhead required by the USB 2.0 operations. I have a 3 year old 800MHZ machine with 256MB of ram. Adaptec says it requires "266MHZ or faster". I spent one hour on the phone with tech support ... trying a myriad of 'fixes' none of which worked. The tech ... said ". . . 800MHZ is marginal speed (!), a 3 year old machine predates the USB 2.0 spec and frequently the 2.0 cards will not work in a machine like this!!!" ...