Any chance you can explain what you did? I have a 4690K and a R9 280 and I'm only getting 40fps at 1080p with everything set to low . My cpu is better than the 2500k, but my R9 280 is not quite as good as the 290. Is it just that?
I have a 2nd screen but only have Discord running.
Turn off hardware acceleration in Discord. Netted me another 5-10fps when I was running the 7970.