Wi-Fi card upgrade for Acer aspire 5310

I am using the Acer aspire 5310 which is running the windows vista. What I want to do is to upgrade the internal wifi card so that it can be an 'n' compatible one but problem is that, I don’t know that which one should I go for. I want to do this because it is not able to connect to my 'n' router currently. I will be really glad if someone of you can help me with this.

It is possible to do this if the card you are using is external and not the embedded one on the motherboard. To do this, first of all you must download the CPU-Z and from the about tab, you can save the report for your machine and attach that post with your next post. This will be more helpful for us to provide answer for this with the report.