Monitors have very variable response times - some just a few milliseconds, others much higher. It might be worth checking out the specs of your old and new monitors. In theory, though, that shouldn't affect fps - monitor response time would only affect how quickly what's on screen reacts to any action you take (e.g. shooting).
Qualcomm Snapdragon 835 benchmarks: Antutu, Geekbench 4, GFXBench and PCMark results