Patch 5.14 Issues/Bugs
So I just patched league, jumped into a game and started stutter lagging the moment i got on the rift. I played around with the settings. I ended up playing on the lowest settings, then tweaked it a little more and figured out it was the shadow. I had to turn the shadow visual effects off for the stutter to go away.
I use a gtx 970, i7, and plenty of RAM. No issues with any graphics before.
If you are experiencing the same issues, just try what I did and turn shadows off.