Most intel based laptops only use integrated graphics, as it as cheap to produce and gives fair performance to the average non-power user/non-gamer. only way to tell if it has any form of dedicated graphics is if the laptop box and a sticker on the laptop is screaming " I HAVE NVIDIA SH*T IN ME YOU DUMAS" then it only has integrated. nVidia never made a GTX740 anyway it starts at GTX750M, or for older laptops etc. GTX650M etc. there was a part of the late GT series just before the GTX called GT640, but hope this clears up some stuff about your laptop. and also, there is a thing called "models." different models have different hardware. you find the "model number" for your specific toshiba, and I can find out the full specs of that laptop my looking up the model on the toshiba website. and then I could tell you if it has nvidia graphics, which i highly doubt. of course, giving me the model number wouldn't do any good because i'm online so rarely, and just happened to notice this post, and went "hmmm".