Gtx 285 SLI Issue

Ok so I have 2 BFG GTX 285 OCX's in sli in my pc. When I open up GPU-z it says my primary card is running at a core clock of 648 which is the stock 285 speed but then it says the second card is running at 702 core which is the right speed. I always thought the cards had to run at the same speeds to be able to sli. Als should I switch the cards around maybe put the 702 in the primary to force the other one to run at that speed? Or is it possible that gpuz is jsut wierding out?

yea thanks i figured it out I guess now nvidia allows two cards in sli to run at two different speeds...Its about time but either way bfg skrewed me cuz i paid for 2 ocx models and really only got one but w.e. I jus oced the slow card up to the other cards speed and its all good thanks for ur input