While I could get to 5.5GHz for PiFast and to do a few things I could not get the validator to output the file at anything more than 5260.43MHz. I am wondering if using CPU-Z 1.70 will be a bit more willing to cooperate.
6sec 849ms Super Pi 1M @ 5385MHz.
11sec 920ms Hexus PiFast @ 5501MHz.
8787.82 pps HWBOT PRIME Benchmark @ 5251MHz.