When the high animation in a screen becomes ur real enemy.
I own a laptop with 4ram, w7 ,duo core blabla laptop, with 20 m internet, but still in some aram games just barely 1 of 30 I think,my game start to lag and delay, I believe is because there are too many champs with higher animations requirements ... like: Extra objects: Sindra, Lux spheres; Ziggs bombs; Taric stun bar and chain, Malzahar, Zyra. Gankplanck, Morgana, Soraka and Nasus with zone efect. Extra minions: Illaoi, Heimer Malzahar, Zyra and Elise ...
Usually at least there are 2 adc in the summoners rift and you dont use to play with 10 guys in a screen, theres always someone missing around xD its solo/duo queu, that maybe the explanation why i dont play with lag normally but ... I think there should be a mode in the menu , something like Tibia mode ... that can let you disable unnecessary animations from the map and some of the champs animations like poros and the shop animations or the rotation of spheres, in those games i prefer to play like in Tibia than with a frozen screen in some moments. xD