QUOTE(maxzhengab @ Mar 18 2014, 12:14 PM)
any idea that gtx 660 is still good currently?wanted to buy a good graphic card..RM600 budget
This is mobile graphic section, head to hardware section.
GTX660 for RM600 is good buy imo, but you better wait for Maxwell successor for GTX660 or just grab GTX750 Ti.
QUOTE(holloway @ Mar 18 2014, 12:25 PM)
probably that 860m isn't at it's mature state? coz still new.. newer drivers with better support and optimizing are coming out. probably 860m single card is better

Core is already slightly higher. but maybe for higher resolution 755m sli is better?
just wondering what do u mean scale perfectly.
Maybe, 860M is literally a GTX750 Ti so we know what to expect, hopefully thermal performance is good.
Most of the time multi-gpu don't scale 2x the performance. Usually you only get 1.5x-1.8x of performance or worst case you'll get -ve scaling where single 755m is better than 755m Sli.