I'm wondering if this is a Cubase issue, I too experience extremely heavy ASIO usage even with one instrument at level 1. When I remove AF there is an immediate drop in ASIO usage. It's tough when the demand is so high, as I love the sounds and would like to have more that one instrument, however, most of the time one is all my computer can handle, and it should have enough power to move this...
Markyboyu, are you still experiencing this problem...if you have a fix it would be nice to know...
cheers.