For some reason since getting the new PC/PC parts I have been getting mouse input lag, and I have no idea why.
Dunno how to fix it either. I've tried turning ingame mouse accelerator off and on, didn't work. Turned off mouse accelerator in Razer Synapse and back on didn't work.
Tried a different USB slot, didn't work.
I thought it was my mouse mat so I ordered a new one last night. Maybe it's just my mouse dying in general.
What are your raw input settings ingame?
Was nice to play with some people last night from here rather than solo queue lottery.