Computer for League of Legends

League of legends is very light game. There are no big demand neither for CPU neither for GPU. So if you wonder what computer you need to play it. Don't be scared it will run on almost any PC. A few word about its requirements. The recommendations are"GeForce 8800 or equivalent video card (Dedicated GPU with 512MB+ Video Memory(VRAM))" or "GT330M" for laptop and these are old outdated GPUs. Even GPU like GT610 can run LoL on lower settings. And higher priced video card like HD7770, GT650 and video card from next tier like HD7870 or GT660(or 760 since NVIDIA released 7th series) are just overkill.

The ranking is like this:

GT610/HD6450 low settings
GT630/HD6670 enough for max settings
GT650/Radeon HD7770 max settings very high frame rate(over 60)
GT660/Radeon HD7870 overkill

What about the integrated graphics?

intel HD4000 - you can play at lower settings at full HD
A8-5600K - same as HD 4000
A10-5800K -if you have fast ram it can even reach the level of Radeon HD6670 DDR3.

For CPU there are no problems at all. Pretty much any dual or more core CPU will do the job. But nowadays there are cheap quad core CPUs available so here is one suggestion for computer for League of Legends with Quad core AMD processor and video card enough to play at frame rates around 100 fps.

ASROCK FM2A75 PRO4-M AMD A75 FM2
ATHLON X4 750K /BOX/FM2
CORSAIR 1x4GB VALUE SELECT DDR3 1600Mhz 1.5V
500GB SEAGATE 7200/6GB/16MB
SAPPHIRE HD7750 1G GD5
CM K350 W/600W PSU