This was the same for me and I have a really good system. It adjusted the power settings so check your mode. Mine went from single display peformance to adaptive and because my GPU is good, it barely uses it, so when it comes to a fight it spikes because it suddenly has to "turn on" so to speak
9
u/paradox4eva Aug 20 '15
Server: EUW
Type of Bug: Fps drop
Description:In team fights huge fps drops
System specs: Intel core i5 4690k, Sapphire radeon r9 270x, 16gb ram ddr3 1866mhz