im not complety sure what your trying to do. i dont have any experience with AMDs, but if you know what speedstep is, and all things alike that AMD uses BE SURE to disable them! becuz if you dont it will throttle down the clocks on idle to save power....otherwise please better explain the situation
You might try setting the CPU-NB HT Link speed manually. This setting needs to be equal to or less than the NorthBridge. (ie... NB 2000MHz~ HyperTranspot 2.0 GHz) Don't know for sure if this will lock it in. But I set it manually when OCing.