I have problem with League of Legends, when the range indictors is enabled. But only on Windows 8.1 . In Win7 it works fine.
I'm using the display range indicators while smart casting option. If I saw my range indicators or I hover the mouse over the skills the FPS drops. I have enabled v-sync, it drop dorn from 60 to 47FPS. When I'm playing in disabled vsync, it goes down 106 from 146, so its a significant performance drop. I did everything I could:
-restart machine for a few times
-tried to reinstall graphics driver (AMD 14.4), even tried to install beta driver (14.6/14.7 betas. all of them)
-quitted every other programs -> no change
-tried windowed, borderless windowsed, full screen -> does not matter
-set catalyst for performance -> nothing changed
-my windows 8.1 is original, i have no pirated software
Other stange thing: when this FPS drop happens, my processor usage jump from 40-50% to 70-80%, but only on 1 core. What the hell?
Other games are working fine. (WoW,GW2,Deus EX HR, Dishonored...)
GigaByte 970A-UD3 1.2
FX-8350 (no oc)
HyperX 1600MhZ 2x4GB CL9 (1.65V)
GigaByte 280 3GB (non-x!)
FSP Raider 550W
The temps are very good (in my opinion):
VGA: max 55C
8350: max 45C
Video about it
Forum post on EUW
I've already wrote to LoL support, but I think it's good if I try to solve this error/bug here too.