High FPS feels like low FPS

So, for the past few months, even though my FPS was 80+, it often feels like it is constantly dipping to less than 40 and remains like that for a few seconds. The ingame FPS counter does not change, yet the game feels incredibly sluggish. I just did a refresh install of Windows 10 a few days ago, so I have no idea what the problem could be.

Pastebin - Hf1hMLFq

Device Name: Razer DeathAdder Elite
Attached: 1

It could be related to this:

I’ve not got any Razer software installed besides the basic mouse drivers. Also my framerate doesn’t ever drop below 60fps, it just feels like it does. Perhaps it’s a form of frame skipping or something?

In that case I would look at overheating as the primary cause.

Overwatch is the only game where I have this sort of problem though. As far as I can remember, all of this started after a game update late last year. Also, after checking my PC for anything Razer related, the only thing I found were two RazerS2S3Coininstaller.dll files in the Sys32 folder, should I try removing them?

You could try opening a ticket with the staff where they can collect more info.