Got new USB 3 powered hub and I think the U1's are running ok now at 0981 (2 Gh/s) but BFG Miner lists the 'effective' hash rate at only 1.5 Gh/s.

Is this something I can adjust or is it simply a pool issue?  I've got hardly any hardware errors on all four units (2 have only 1 HW error).

Any ideas?