How will an i7-4700MQ with 755M in SLI perform?

farcry 3 runs 40-50 fps @ custom/high @1080p
Battlefield 3 runs 60-80 fps @ custom/high'ish @1080p
Saints row 3 runs 40-50 fps @ high'ish settings @ 1080p

"beast" gaming laptop for 1200$
 


How long should it perform like that for?
 


depends on the games really.