cuda 6.5 installation with display driver 340.29

I have recently installed cuda 6.0 with a view of performance increment in windows 7 . the toolkit installer has display driver installer along with it and it installed display driver version named as . is this version mean 340.62???

Also it is mentioned that driver version 340.29 with cuda increases performance according to this

does 340.xx series have the same performance ?? I couldnot get the version 340.29 driver. where can i download it from???