Massive lag/spikes/shuttering on league of legends. Without knowing the reason HELPP PLZ

[nearrr]

Apparently i have no clue about PC's thats why i need some help. I got a computer before 6 months from pc world. I was playing only league of legends with 100-150 fps and 42ping until before 5 days, everything turned around, the game is way too laggy and indeed unplayable.

its a lenovo pc with windows 8.1
processor intel(R) Core(TM) i5-4460 CPU @ 3.20GHz 3.20GHz
Installed memory (RAM): 8GB
system type: 64xbit operating system, x64 based processor
and my graphic card is a nvidia gt 705.

i have skanned my pc for virus or malware nothing seems wrong.
my core's temperatures are at 20-30C while i play league, i think i check them right with hwmonitor
my internet connection is 50mbps.

but the game is laggy as hell and i dont know my google research only drives me crazy with 22281841481 stuff that could be causing this. Any answer appreciated! sorry for the bad english

 

[szalz]

Problem is you need to determine is it lagging because of your hardware or Internet connection. The game has random lag spikes now and again but these last for a few seconds and you should be more than able to cope. Is your gpu temperature ok while your playing? Generallying a nvidia card should cope fine up until 80 but league shouldn have it touching that. How much do you have going on in the background? Uninstall and do a fresh install see if that fixes things

 

[nearrr]

Problem is you need to determine is it lagging because of your hardware or Internet connection. The game has random lag spikes now and again but these last for a few seconds and you should be more than able to cope. Is your gpu temperature ok while your playing? Generallying a nvidia card should cope fine up until 80 but league shouldn have it touching that. How much do you have going on in the background? Uninstall and do a fresh install see if that fixes things

so my gpu temperature goes to 57 C idk if its ok, i have unistalled league 3 times and install it again, aswell trying to repair it 3-4 times. i dont know how exactly to check if everything is ok with my connection the only thing i did was checking at speedtest if everything is ok with my speed. Btw ingame i got stable 42 ping it never falls or gets higher than this i dont know if it helps my fps goes a little crazy around 150-80 sometimes but i think i got lags even when the fps stays 150 . I usually have everything closed when i go to play league