I've heard that 940m is from mid-2015 and 940mx is just a renewed 940m in 2016 which performance has been increased by 20-30% by adding a gddr5 option and making speeds (mhz) slightly bigger. Personally, i've never had an i3 and i still think they have not enough power, so i only use i5. 940m is compared to GT 640 if i remember correctly. 940mx 2gb ddr3 is 21% slower than stock 650 2gb, as i said before, there is no 1gb gddr5 version to compare and i believe that gddr5 would perform 20-30% better, so it's about to be almost the same to 650 stock. This is going to be my first laptop. I dont have gaming in mind, it's going to be for work mostly, but it has a dedicated video card and i would like to find out what performance could i get out of it since i really like GPUs. I've seen that the most recent games at 720p / 768p run at 30-40+fps at low-medium graphics on i5-6200u + 940mx 2 gb ddr3 machine, i added 1080p for really light applications/games, yes, it is out if it comes to higher-end game titles. I've read some articles and found out that 1gb vram is enough for 1080p (i wouldn't get less than 2gb personally), so i'm inclined to believe that 1gb gddr5 will be enough for 768p. I've come to a theory that 940mx might not be powerful enough to fully take advantage of 2gb vram, is this logical? But i still can't understand why i can't find tests with 1gb version of 940mx? I've seen a title "nvidia sthealthily releases 940mx, 930mx and 920mx", maybe that's the reason.. but that would be weird :/
Yes! that's the webpage i've been looking at, 940mx isn't that bad at 768p, since the ppi on laptop with 768p is bigger than my 1080p desktop, i should be fine.
Edited:
This might be the key
http://hexus.net/tech/news/laptop/91205-nvidia-stealthily-releases-geforce-940mx-930mx-920mx/
940mx becomes a decent gpu for 720p / 768p, but i would like to know if i5-6200u is capable of not being a problem/bottleneck for the system?