Cmoon man, its the middle of summer, it can't be that cold ?!

When the recent patch came live the champion i play has been shaking/twitching almost all the time when on locked camera (not so much if unlocked) but when it comes to casting spells or WHEN 4 MINIONS start whacking their heads fps goes to **** despite not having that much ping (~30), not to mention the teamfights ... I thought it was my PC's problem (checked video card, monitor refresh rate... messed with all kinds of settings) but it wasn't. Already tried Vsync, movement prediction repairing and reinstalling but nothing changed. Are any of you experiencing this problem and how does it get fixed ? PS: I have warm skins selected, so thats not it :D
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