Will this card work on my Mac Pro 2006 2.66GHz Intel Xeon I will be running Windows 7 Professional ONLY. Mac OS X is not installed on this machine. Right now I have a NVIDIA Geforce 8800GT and its not working well with any of my games. http://www.newegg.com/Product/Product.aspx?Item=N82E16814130912 1. Will it work? 2. If it will work should I just buy a gaming PC for the cost of upgrading?