Probably already addressed many times in this multi page thread, but the benchmarking takes too little time for some algos especially for multiple cards.   Sadly, sometimes these CCMINER versions take 5 or more minutes for all the cards in a rig to get going and the benchmarking shuts off way before the true hashrate can be discovered.      I use this software a bunch and really like it.   Something I've been meaning to come back and ask about.