http://www.nvidia.com/object/win7-winvista-64bit-270.51-beta-driver.html
do a CLEAN UNINSTALL of whatever nvidia driver your using and run driver sweeper reinstall the new beta driver and sli WILL WORK. or at least it did for me 1 am averaging about 150 fps now and BOTH gpus are getting hot!
so since crytek svcks and didnt inform us of well ANYTHING i thought this might help a few people