In April I purchased a new 6 core Processor (Studio XPS 7100 )  but have constantly had issues with the wi-fi connection. 

Often the wi-fi will either disconnect or show very limited signal or just take forever to load up a page or simple just be unable to load a page at all. 

This is in contrast to my mobile which at the same time has no issue accessing the same pages via the wi-fi. 

I have a 50meg Broad Band connection and all other devices work fine apart from the pc!

I have now had enough and am looking to replace the rubbish PCIE card ( network 1525 - 802.11 n - ) that Dell so kindly supplied however I am unsure at what would be the best one to get. 

Any suggestions would be much appreciated!