If you think about it in the long run, there is room for a Deneb at 3,4 GHz out of the box. After that, there is no more names in the 9XX series.
P2 945 = 3GHz
P2 965 = 3,2GHz
P2 985 = 3,4GHz

May be everything else that is higher than 3,4 will be FX? That is if there will be anythig to come out clocked above 3,4.