I have to wonder about all those hardware errors though. I asked earlier in the thread about their effect on the system.
All of my Ants run at about 2.10+ with bfgminer, which is why I'm interested in this.
The answer is at least with cgminer, you can ignore them if your hashrate is actually higher.
I get 2.236GH out of my antminer U1 running at a clockspeed of 280
EDIT: It generates heaps of hardware errors at that speed but still generates valid hashes at a higher hashrate.