1080 and 8600k not getting constant 144fps @ 1080p

[seanpcc89]

I recently upgraded from a gtx 1050ti and i5 7600 to an 8600k and 1080. I mostly play Rainbow Six Siege and I was hoping I could get a constant 144+fps on low @ 1080p but to my surprise I often dip below into the 120-30's. I've tried reinstalling drivers, windows and tweaking nvidia settings but nothing fixed my issue. I overclocked my 8600k to 5ghz and saw a small improvement. I doubt it is a thermal bottleneck because my gpu runs at around 70c and my cpu in the 60's. I also play the game on all low without AA. Any ideas? Thanks.

rest of my specs:
144hz mg248q
60hz aoc monitor

8600k @ 5ghz
1080
z370 extreme4
2400mhz 1x8gb corsair vengeance
cx600 psu
120gb ssd (r6 is on my ssd)
1tb hdd

 

[TechyInAZ]

There could be an in game framelimit, try checking and seeing if the games you play have one.

 

[seanpcc89]

The frame rate limit is uncapped. I go from 120-200+ but its never consistent.