The difference in clock speed is a bit more than 11% in base and boost clock. You are getting a good factory overclocked option. As boost clock depends on a lot on the cooling ability of the graphic card, it is easy to assume a non-reference card ( in this case- the AMP! Extreme) will do a better job at providing better performance.
Business software left the office and moved into the home long ago. If you've ever lost the password to Word, ZIP or PDF file in misguided attempt to protect data from prying eyes, this guide to Decrypting Document and File Passwords is a life saver. PCSTATS Tips