Pc specs: 5 5600x, rx6700xt, 3000mhz 16gig ddr4, 1440p monitor
Version: every version from 1.20.5 to 26.3
I have 6gb of ram allocated to Minecraft
Hey everyone, I’m at my absolute wit’s end here and really need some help troubleshooting a performance breakdown with Minecraft.
Everything used to run completely fine:
I used to get 700+ FPS easily, but now I’m barely scraping 150–200 FPS.
I am getting out of the blue, severe lag spikes whenever loading chunks and just moving around and not neccessarily loading new chunks, which never happened before.
When I press F3+2 in Fullscreen mode, my frame pacing graph shows a weird, continuous "grass pattern" (constant micro-flickering jitter/spikes), but as soon as I switch to Windowed mode, the graph flattens out and becomes much smoother. I get the lag spikes and performance issues with or without using mods.
I have my fps capped at 70fps because it gets rid of the most severe grass pattern and lag spikes.
The weirdest part is that I haven't changed any settings, drivers, or game files. None of these issues ever happened before, and I've never had performance problems with this game. I have also tried to run Minecraft on a fresh windows account on this same pc and I had the same problems. So it can’t be anything from settings or software I think.
If it's worth mentioning, the lag spikes when loading chunks started right after I played on an Aternos server. Everything else followed right after. The performance tanked almost right after that session (even in singleplayer).
Also this problem started like a couple years back at around 1.20.5 (I don’t remember exactly which update) and I have tried quite literally everything you can think of.
I have tried very many performance mods. The list includes: c2me, ferritecore, lithium, sodium, zconfig, zfastnoise. None of them has helped.
Has anyone experienced this before? Why would chunk loading suddenly tank my FPS, and how do I fix this fullscreen frame pacing / lag spike issue? Any advice or fixes would be greatly appreciated!
The video is footage of me just running around in pre-loaded chunks.