A&G is not a good brand, thats why it is cheap & performance is less...
MSI or XFX are good brands for the 9800GT.... Personally I use MSI 9800GT which is perfect for gaming....
Here try this link
http://downloadcenter.intel.com/default.aspx
or this link for Automatic Driver updates
http://www.intel.com/support/detect.htm?iid=dc_spotlight_home1
hope this is helpful...