This has to deal with the new FSB of the SR chips being at 800mhz. The program's you're using are made for the older chips running at 667mhz.
800mhz/667mhz =1.1994
The max you should be seeing in the programs you're using right now sounds right if they can hit up to 2ghz.
2ghz * 1.1994 = 2.39ghz