I assume you mean Stafford (Perkins = 5% fixed, Stafford = varies, cap of 8%, Private = skys the limit)
4.7 is the going rate nowadays from most of the major lenders (Salliemae/Access Group), but that is probably going to change for next academic year. By comparison, if you took out your loans last year they were at 2-3%.
There's still a max cap of 8%