It worked out of the box in my other PC and it did work during install but right now, sometimes it works fine and sometimes the connection is awefully slow even though reception is really good and I can't do anything that requires an internet connection. No additional driver suggested. Is there any tests I can run?
Try Issuing the Following Commands in a Terminal:
The First Command Will Turn Off the Wireless Service. Thee Second will Restart it with the N Wireless Disabled
This is because there is a bug in Intel Wireless Cards that Makes it preform very slow when connected to wireless N Networks